Casey asks a random sample of students at his school about their natural hair and eye colors. The results of his survey are shown in the relative frequency table. ![](http://admin.getprephub.com/media/editor/14_20230225192026843749.png) In the sample, there are $$4$$ more students with brown hair and blue eyes than blonde hair and blue eyes. How many total students have black hair?

Let $$x$$ be the total number of students. $$0.125 x-0.075 x=4$$ Or, $$0.05 x=4$$ Or, $${x}=80$$ Total number of students having black hair $$=0.250 \times 80=20$$

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Casey asks a random sample of students at his school about their natural hair and eye colors. The results of his survey are shown in the relative frequency table.

In the sample, there are $4$ more students with brown hair and blue eyes than blonde hair and blue eyes. How many total students have black hair?

20

40

60

80

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