For integers a, b, c, a / (b-c) = 1. What is the value of

Question

For integers a, b, c, a / (b-c) = 1. What is the value of (b-c)/b?

(1) a/b = 3/5
(2)  a  and  b  have no common factors greater than 1

eschn3am · Answer

Answer A

As long as the ratio remains the same the answer will remain the same.

A=3 
B=5
C=2

(5-2)/5 = 3/5

OR

A=6
B=10
C=4

(10-4)/10 = 6/10 = 3/5

a/(b-c) = 1 so we know that (b-c) = a
we can then substitute a for (b-c) in the second question
what is the value of a/b?

1. a/b = 3/5 and there's our answer! SUFFICIENT

dvdv · Answer

3/5

explanation :

a/(b-c) = 1

(b-c) = a

divide by b on both sides..

(b-c)/b = a/b = 3/5

akhi · Answer

Perfect approach..A for me too

Mishari · Answer

For integers a, b, c, a / (b-c) = 1. What is the value of (b-c)/b?

Solution:

a = b-c  
 (1) a/b = 3/5

a = 3b/5 --> there fore a = 3b/5 = b -c 
then b-c/b = (3b/5) / b = 3/5

Sufficient

(2) a and b have no common factors greater than 1

This says nothing about C and thus  insufficient

ANSWER: A

pmenon · Answer

A

rearranging whats given in the stem, you have a=b-c. Further examination says that b-c/b = a/b

stat 1 gives you a/b, so you know the answer

stat 2 just says info about a and b. nothing about C

bsjames2 · Answer

For integers a, b, c, a / (b-c) = 1. What is the value of (b-c)/b?

(1) a/b = 3/5
(2) a and b have no common factors greater than 1
For integers a, b, c, a / (b-c) = 1. What is the value of (b-c)/b?

(1) a/b = 3/5
(2)  a  and  b  have no common factors greater than 1

1) We know that a=b-c, so (B-C)/b= a/b = 3/5 SUFFICIENT

2) Tells us nothing

GMATBLACKBELT · Answer

a=b-c. a/b=?

1: Suff.

2: cannot get anything from this.

A.

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