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a1choi
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a1choi
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yeah me too got the same answer....is thr any thng wrong in the answer choices?
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a1choi
Several students are studying together for an exam. 60% of the students who studied less than 10 hours a week feel unprepared. 80% of students who studied 10 hours or more each week feel prepared. If 75% of the students studied less than 10 hours per week, what percent of the students feel prepared for the exam?

A. 20
B. 25
C. 30
D. 35
E. 60

The answer is missing from the options.

Let's say there are 100 students.

Students who studied <10 hrs = 75% = 75
So students who studied =>10hrs = 25

Given: 60% of the students who studied less than 10 hours a week feel unprepared.
So 40% of 75 (=30) feel prepared

Given: 80% of students who studied 10 hours or more each week feel prepared.
So 80% of 25 (= 20) feel prepared

Total (30 + 20) = 50 out of 100 feel prepared. 50% feel prepared
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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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