Bunuel wrote:
How many of the boys in a group of 100 children have brown hair?
(1) Of the children in the group, 60 percent have brown hair.
(2) Of the children in the group, 40 are boys.[/i]
Ans: E
Solution: we need to find number of Boys with brown hairs in a group of 100 children.
1) of the 100, 60 have brown hairs. but we do not know the ration of boys and girls. we need to find exact number of boys who have brown has. [Not Sufficient]
2) of the Children 40 are boys. now we know the number of boys but this statement does not tell us anything about brown hair ratio among the boys. [Not Sufficient]
combining 1 and 2, it tell us there are 60 children who have brown hairs and there are 40 boys in the group. but these two does not provide any info from which we can deduct the exact number of boys with brown hairs.
Ans: E
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