In 1998, 86% of all Caucasians in the U.S., 77% of all African-Americans, 70% of all Hispanics, and 85% of residents not classified into one of these groups used the Internet for e-mail. At that time, the U.S. population was 69% Caucasian, 12% African-American, and 13% Hispanic. What percentage of U.S. residents who used the Internet for e-mail were Hispanic Round your answer to the nearest 1%.
A)22%
B) 89%
C) 19%
D) 11%
E) 12%

Question

In 1998, 86% of all Caucasians in the U.S., 77% of all African-Americans, 70% of all Hispanics, and 85% of residents not classified into one of these groups used the Internet for e-mail. At that time, the U.S. population was 69% Caucasian, 12% African-American, and 13% Hispanic. What percentage of U.S. residents who used the Internet for e-mail were Hispanic  Round your answer to the nearest 1%.  
A)22%
B) 89%
C) 19%
D) 11%
E) 12%

Quizplus · Accepted Answer

To find the percentage of U.S. residents who used the Internet for e-mail and were Hispanic, calculate the weighted average: (0.69 * 0.86) + (0.12 * 0.77) + (0.13 * 0.70) + (0.06 * 0.85) = 0.8371. The Hispanic contribution is (0.13 * 0.70) / 0.8371 ≈ 0.1086, which is approximately 11%.

In 1998, 86% of All Caucasians in the U