SOLUTION: There are 100 students. 40% of them have brown hair. 30% that have brown hair are boys. How many boys have brown hair?

SOLUTION: There are 100 students. 40% of them have brown hair. 30% that have brown hair are boys. How many boys have brown hair?

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Question 366676: There are 100 students. 40% of them have brown hair. 30% that have brown hair are boys. How many boys have brown hair?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Of the 100 students, 100*0.40 = 40 have brown hair. Of these, 40*0.30 = 12 are boys. So 12 boys have brown hair.
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