Exercise 17 Page 284

We are asked to complete the table showing the results about students' preferred frozen yogurt flavor. To complete the table, we must remember that the last row and the last column show totals.

	Preferred flavor
Gender	Vanilla	Mint	Strawberry	Total
Girl	$45-(15+18)$	$15$	$18$	$45$
Boy	$17$	$25$		$100-45$
Total		$15+25$		$100$

To find the total number of students who preferred vanilla, we add the number of girls who prefer vanilla and the number of boys who prefer vanilla. Conversely, to find the number of boys who preferred strawberry, we subtract the number of boys who preferred vanilla and mint from the total number of boys.