144144 wrote:

so no answer for this one?

can someone give a similar question so i can c if i know how to solve it?

thanks.

The official answer is 1/2, but all members, including me, are getting the answer as 1/8. I will send an email to Bell Curves to see how they justify their explanation. So I guess we'll have to wait till then.

This question is more like fractions/ percentages than probability really. To see similar problems, you can check out problems on successive change in percentages type questions. A similar but not exactly same example:

Q: The population of a town increased by 10% in 2000 and by another 10% in 2001. What is the total percentage change in the population?

There are plenty such problems in this forum as well as prep books such as OG and

Kaplan.

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My GMAT debrief: from-620-to-710-my-gmat-journey-114437.html