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On simplying the statements, we get,
T:A = 3:4
T:N = 9:16
A:C = 3:2

That further gives us T:A:N:C as 9:12:16:8
Smallest 3 digit number with distinct digits is 102
So T + C is < 102

We know from the proportions that T:C = 9 : 8. Now, assuming T=9x and C=8x, we get 17x<102, or x < 6

To maximise the value of A+N, x should be maximum. Maximum value of x=5

So max value of (A+N) = Max value of (12x+16x) = 28x = 140
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The ratio of trainees to assistants is 3 : 4.
T/A=3/4 ; A=(4/3)T
The ratio of trainees to nurses is 3/4 of the ratio of trainees to assistants.
T/N=(3/4)(3/4)=9/16 ; N=(16/9)T
the ratio of assistants to coordinators is twice the ratio of trainees to assistants.
A/C=2(T/A) ; C/A=2/3 ; C=(8/9)T
A=(4/3)T & N=(16/9)T & C=(8/9)T
Let, T=9k
Than, A=12k & N=16k & C=8k

If the combined number of trainees and coordinators is less than the smallest three-digit positive integer with distinct digits.
T+C<102
9k+8k<102
k<6
Highest value of k is 5.
the maximum possible combined number of assistants and nurses =12k+16k = 28k = 28*5=140

C
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T : A : N : C
3 : 4
3 : 4
3 : 2
9 : 12 : 16 : 8
9x,12x,16x,8x
smallest 3 digit number with different digit: 102
T+C<102
17x<102
x<6
x=5 (for max value)
therefore A+N = 28*5 = 140
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I am not sure but this is how I solved it and it took so much time. I don't know if there is any shorter method.

Given that: Trainees (Let T) : Assistants (Let A) = 3:4
Trainees : Nurses (N) = 3/4(3/4) = 9/16
Assistants : Coordinators (C) = 2 * (3/4) = 6/4
And, T + N < 102 ---------------------------------------> eq-1
We need to find max possible value of A+N.

Since T/A = 3/4
T = 3A/4

and since A/C = 6/4
C = 4A/6

Plugging these values in eq-1:
3A/4 + 4A/6 < 102
A < 72

Similarly, T = 9N/16, because T/N = 9/16
And, since N = 4A/3 and A = 6C/4, by substituting the value of A in the equation: N = 4A/3,
we got C = N/2

Plugging these values in eq-1:
9N/16 + N/2 < 102
N < 96

Since, we want to maximize A+N, let's assume that A = 71 and N = 95,
which gives A+N < 166

Hence, IMO answer is 140.
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Ratio Data
- T:A = 3:4
- T:N = 3/4 (T:A) = 3/4 * 3/4 = 9:16
- A:C = 2 (T:A) = 2 * 3/4 = 6:4

Requirement
- If the sum of T+C < smallest three-digit integer with distinct digits

Q: Maximum A+N?

Answer:

First, make the T:A:N:C clear
T : A : N : C
3 : 4
9 : 16
6 : 4
---------------------
9 : 12:16 : 8

Then,
T : A : N : C
T -> 3*3 = 9 (since T:N=9:16, T:A *3)
A -> 4*3 = 12 (T:A*3 since T:N=9:16)
C -> 4*2 = 8 (since T:A=9:12, A:C*2)

We got final T:A:N:C = 9:12:16:8

Second, calculate the combined numbers

T+C < smallest 3-digit with distinct digits (what is this number)
T+C < 102 (why? smallest 3-digit is 100, then if it's distinct it should be the smalles 102)
9x + 8x < 102
17x < 102
x < 6

Third, calculate the maximum A+N

Since x < 6, the maximum x=5
A+N = 12x + 16x = 28x
28 (5) = 140 (answer C).


Bunuel
At a volunteer clinic, every volunteer is assigned exactly one of four roles: trainee, assistant, nurse, or coordinator. The ratio of trainees to assistants is 3 : 4. The ratio of trainees to nurses is 3/4 of the ratio of trainees to assistants and the ratio of assistants to coordinators is twice the ratio of trainees to assistants. If the combined number of trainees and coordinators is less than the smallest three-digit positive integer with distinct digits, what is the maximum possible combined number of assistants and nurses?

A. 112
B. 128
C. 140
D. 168
E. 196


 


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Let the number of Trainees, Assistants, Nurses & Coordinators be T,A,N & C respectively

T/A = 3/4
T/N = 3/4 * 3/4 = 9/16
A/C = 3/4 * 2 = 6/4

(Refer photo after this for the consolidated ratio)

So, T:A:N:C = 9:12:16:8 = 9x:12x:16x:8x

We are told that T+C < 102 (smallest three digit positive integer with distinct digits) which means 9x+8x < 102 or 17x < 102 or x<6. Since we need to maximize A+N, we need the maximum possible integral value of x which can be 5

So maximum A = 12 * 5 = 60
Maximum N = 16 * 5 = 80
Maximum combined = 60+80 = 140
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IMO C
As/Q, T:A = 3:4
T/N= 3/4 x T/A or A/N = 3/4
T: A: N = 9: 12:16 (equating the ratios of A in both)

Now, A/C = 2 x(T/A) then, C = AxA/2T = 8
Hence ratio = T:A:N:C= 9:12:16:8
The Q says T+C< smallest 3 didgit no with distinct digit = 102
T+C<102 or 9x+8x<102 or 17x<102 or x<6
Hence max possible no for A+N = 12x+16x = 28x = 28x5 =140
Bunuel
At a volunteer clinic, every volunteer is assigned exactly one of four roles: trainee, assistant, nurse, or coordinator. The ratio of trainees to assistants is 3 : 4. The ratio of trainees to nurses is 3/4 of the ratio of trainees to assistants and the ratio of assistants to coordinators is twice the ratio of trainees to assistants. If the combined number of trainees and coordinators is less than the smallest three-digit positive integer with distinct digits, what is the maximum possible combined number of assistants and nurses?

A. 112
B. 128
C. 140
D. 168
E. 196


 


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T:A:N:C = 9:12:16:8
now, (9+8)x<102
x<6
max x = 5
so answer = 5*(12+16) = 140
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t:a=3:4 = 9:12
t:n=9:16
a:c=3:2 = 12:8

a:t:n=12:9:16
a:t:n:c=12:9:16:8

a=12x, t=9x, n=16x, c=8x

minimum 3 digit no. = 102

17x<102
x<6..x=5

a+n=28x=28*5=140

Ans C
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Let the no. of trainees be consistent across all the ratios.

T : A = 3 : 4
T : N = (3/4) * (3 : 4) = 9 : 16
A : C = 2 * (3 : 4) = 6 : 4 = 3 : 2

Using a common value for trainees:
T : A : N : C = 9 : 12 : 16 : 8
So,
T + C = 17x
A + N = 28x

The smallest 3 digit +ve integer with distinct digits is 102

Given, 17x < 102
-> x <= 5

Max A +N = 28 * 5 = 140

Ans : C
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T : A = 3 : 4
T : N = 9 : 16
A : C = 6 : 4

We can multipliy each elements by integers and find ratio of all four which is T : A : N : C
9 : 12 : 16 : 8

T + C < Smallest 3 digit integer

Hence 9x+8x < 102 i.e 17x < 102 hence x can be max 5

Hence the ratios of A : N will be 12x : 18X ie 5 (12+16) = 28 x 5 = 140

IMO C

Bunuel
At a volunteer clinic, every volunteer is assigned exactly one of four roles: trainee, assistant, nurse, or coordinator. The ratio of trainees to assistants is 3 : 4. The ratio of trainees to nurses is 3/4 of the ratio of trainees to assistants and the ratio of assistants to coordinators is twice the ratio of trainees to assistants. If the combined number of trainees and coordinators is less than the smallest three-digit positive integer with distinct digits, what is the maximum possible combined number of assistants and nurses?

A. 112
B. 128
C. 140
D. 168
E. 196


 


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Volunteer roles: Trainee(t) ,Assistant(a), Nurse(n) , Coordinator(c)

t/a=3/4
t= (3/4)a

t/n=3/4 (t/a) implies t/n= 9/16 implies n=(16/9)t
n= (16/9)*(3/4)a= 4/3a

a/c=2(t/a) implies a/c= 3/2 implies c=(2/3)a

(t+ c )< smallest 3 digit positive integer with distinct digit ( this will be 102)
Implies t+ c= (3/4)a+ (2/3)a= (17/12)a< 102
implies a < (102*12)/17
implies a < 72

We have to find max( a+ n)
a + n= a+ 4/3a = 7/3 a

We found out that a< 72

It simply means a +n < (7/3)*72
< 168

Only first 3 options are less than 168 satisfying the condition which are 112, 128 and 140

check them one by one,

if a+ n=112 then a will be 48, so n will be 64, t will be 36 and C will be 32 ( possible)

if a + n =128 then a has fractional value as (128*3)/7 reject

if a+n =140 then a will be (140*3)/7 =60, n will be 80, c=40 and t=45 ( possible)

But since out of both possibility 140 is maximum, answer will be 140

Answer- C
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So many ratios might be confusing so we try to put this in one common ratio for all the variables. Using Trainee as T, Assistant as A, Nurse as N and Coordinator as C.
given T/A = 3/4
T/N is 3/4 of T/A so we can say T/N = (3/4)x(3/4)
T/N becomes 9/16.
Also A/C =2 (T/A)
A/C = 3/2
From the above we try to bring everything to common ratios: T:A:N:C.
T:A = 9: 12
T:N = 9:16
T:A:N = 9 : 12 : 16
And from A:C = 3:2 we get :
T:A:N:C = 9:12:16:8
We need to find the A + N.
T+C+A+N = 45x
Also given that T+C < 102. or 17x < 102 so x <6.
So x has to be 5.
Now 45*5 = 225 - 85 (85 because 17*5 from previous step)
= 140.
Ans is C.

Bunuel
At a volunteer clinic, every volunteer is assigned exactly one of four roles: trainee, assistant, nurse, or coordinator. The ratio of trainees to assistants is 3 : 4. The ratio of trainees to nurses is 3/4 of the ratio of trainees to assistants and the ratio of assistants to coordinators is twice the ratio of trainees to assistants. If the combined number of trainees and coordinators is less than the smallest three-digit positive integer with distinct digits, what is the maximum possible combined number of assistants and nurses?

A. 112
B. 128
C. 140
D. 168
E. 196


 


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t = trainees
a = assistants
n = nurses
c = coordinators

t: a = 3:4 or 3x : 4x. where x is multiplier

t : n 3/4 x 3/4 = 9/16

Therefore T=9x, A = 12x, N = 16x

The ratio of assistants to coordinators is twice ratio of trainees to assistants.

a/c = 2 x 3/4 = 3/2 = 3:2

if a = 12x, than c = 8x

Therefore t = 9x, a = 12x , n =16x and C= 8x

smallest three digit number is 102

therefore t + c = 9x + 8x = 17x < 102

x <=5, max by using 5

a + n = 12x + 16x = 28x, x is 5

a + n = 28 x 5 =140

Answer C 140
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Bunuel
At a volunteer clinic, every volunteer is assigned exactly one of four roles: trainee, assistant, nurse, or coordinator. The ratio of trainees to assistants is 3 : 4. The ratio of trainees to nurses is 3/4 of the ratio of trainees to assistants and the ratio of assistants to coordinators is twice the ratio of trainees to assistants. If the combined number of trainees and coordinators is less than the smallest three-digit positive integer with distinct digits, what is the maximum possible combined number of assistants and nurses?

A. 112
B. 128
C. 140
D. 168
E. 196


 


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T/A = 3/4

T/N = 9/16

A/C = 3/2

Getting the ratios in a comparable level

T/A = 9/12
T/N = 9/16
A/C = 12/8

T:A:N:C = 9:12:16:8

9x + 8x < 102

x < 6

For max, x = 5

12+16x = ?

28*5 = 140

Option C
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Bunuel
At a volunteer clinic, every volunteer is assigned exactly one of four roles: trainee, assistant, nurse, or coordinator. The ratio of trainees to assistants is 3 : 4. The ratio of trainees to nurses is 3/4 of the ratio of trainees to assistants and the ratio of assistants to coordinators is twice the ratio of trainees to assistants. If the combined number of trainees and coordinators is less than the smallest three-digit positive integer with distinct digits, what is the maximum possible combined number of assistants and nurses?

A. 112
B. 128
C. 140
D. 168
E. 196


 


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t/a = 3/4 ...... t/n = 3/4*(3/4) = 9/16......a/c = 2(t/a) = 3/2.... we can express everything in terms of one variable a..
c = 2a/3, n = 4a/3. it is given c+n<102
6a/3<102. a<51
max possible value of a+n = ?
n = 4a/3
a+n = 7a/3, a should be divisible by 3 and less than51, so max value is 48. therefore ans = (48*7)/3 = 112 OPTION A
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t:a=3:4 and t:n=(3/4)*(3/4)=9:16
so t:a:n=9:12:16
also given a:c=2*3/4=3:2
so t:a:n:c=9:12:16:8
as the combined no. of t+c is less than smallest 3 digit no. with all distinct digits i.e. 102
17x < 102 or x is less than 6 that is the maximum value of a+n=28*5=140
C
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