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chetan2u
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IMO E is the correct choice.

we have one even and 2 odd numbers.Cases I, II, III will all be True.

Thanks!

chetan2u
If a,b and c are positive integers and only one out of them is even, which of the following must be even?

I. \(\frac{ab}{c}\), where ab/c is an integer.
II. abc
III. a+b+c

A. Only I
B. Only II
C. Only III
D. Only II and III
E. I, II and III

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Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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