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by alex.gellatly » Wed Jul 11, 2012 11:30 pm
What is the probability that a student randomly selected from a class of 60 will be a male who has brown hair?
1. one half of the students have brown hair
2. one third of the students are males
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Source: — Data Sufficiency |
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by niketdoshi123 » Thu Jul 12, 2012 2:37 am
alex.gellatly wrote:What is the probability that a student randomly selected from a class of 60 will be a male who has brown hair?
1. one half of the students have brown hair
2. one third of the students are males
Question rephrased : # of males with brown hair in the class ?

Statement 1

In the class 30 students have brown hair.
No information about the # no of males with brown hair

INSUFFICIENT

Statement 2

In the class 20 of the students are male
again no information about the # of males with brown hair.

INSUFFICIENT

Combining both the statements

Still the information is not sufficient, since the # of males with brown hair can vary from 0 to 20.

hence the correct answer is E
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