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Bunuel
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Welcome to GMATClub CoolSack :)
You need to solve for Statement (2) as well
CoolSack
All in ratio of 4:9:7 =c:m:s =120
4+9+7 = 20, 120/20 =6, m-s = 9-7=2, 2*6=12
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C + M + S = 120.
C:M =4:9

C=4x and M=9x
13x+ S =120
Statement 1
C: S= 4:7

C:M:S= 4:9:7
13x + 7x = 120
20x = 120
x = 6
Therefore, M - S = 2x =12
Statement 1 is sufficient.


Statement 2

S = C + 18 => S= 4x +18

13x + (4x + 18) = 120
17x + 18 = 120
17x = 102
x = 6


M - S
= 9x - 4x -18
=5x -18
=30 - 18
=12
Statement 2 is sufficient.


Correct Answer: D
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c/m = 4/9

total = 120
c+m+s =120
4x+9x+s = 120
13x+s = 120

m = p + s
for this to figure out, we need essentially value of X.


S-1
c:s = 4:7
we also have c:m = 4:9

c:m:s = 4:9:7
total = 20x
120 = 20x
x= 6

sufficient

S-2

s= 18 + c

13x + s = 120
13x + 18+ 4x = 120
17x + 18= 120
x= 6

sufficient

each option alone is sufficient.
option D
Bunuel
A bakery display case contains only croissants, muffins, and scones. If the ratio of croissants to muffins is 4 to 9 and the display case contains 120 pastries in total, how many more muffins than scones are in the display case?

(1) The ratio of croissants to scones is 4 to 7.
(2) The number of scones is 18 more than the number of croissants.

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