Chris was given $\frac{1}{3}$ of the 84 cookies in the cookie jar. He ate $\frac{3}{4}$ of the cookies that he was given. How many cookies did Chris eat?
(A) 36
(B) 48
(C) 35
(D) 28
(E) 21
Chris was given $\frac{1}{3}$ of 84 cookies, or $\frac{1}{3} \times 84=\frac{84}{3}=28$ cookies.

He ate $\frac{3}{4}$ of the 28 cookies he was given, or $\frac{3}{4} \times 28=\frac{84}{4}=21$ cookies.

ANSWER: (E)