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What is the ratio of a : b : c?

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Source: — Data Sufficiency |

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by Jay@ManhattanReview » Tue Oct 24, 2017 2:58 am
LUANDATO wrote:What is the ratio of a : b : c?

1) c/a = 3 and c/b = 2

2) ab = c and c = 6

The OA is A.

I don't understand this DS question. Can any expert help me with it? Please. Thanks.
1) c/a = 3 and c/b = 2

=> a = c/3 and b = c/2

Thus, the ratio a : b : c = c/3 : c/2 : c = 1/3 : 1/2 : 1. Sufficient

2) ab = c and c = 6

=> ab = 6 => a = 6/b

Thus, the ratio a : b : c = 6/b : b : 6. We do not have the value of b. Insufficient

The correct answer: A

Hope this helps!

-Jay

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