In a certain year, 86% of all Caucasians in the U.S., 77% of all African-Americans, 77% of all Hispanics, and 81% of residents not classified into one of these groups used the Internet for e-mail.
At that time, the U.S. population was 64% Caucasian, 10% African-American, and 12% Hispanic.

What percentage of U.S. residents who used the Internet for e-mail were Hispanic?

(Round your answer to the nearest whole percent.)

Question

contestada

Respuesta :

Favouredlyf Favouredlyf · Answer 1 · 2019-11-14T22:22:38+01:00

Answer: 0.0924%

Step-by-step explanation:

In a certain year,

86% of all Caucasians in the U.S. used the Internet for e-mail.

77% of all African-Americans, used the Internet for e-mail.

77% of all Hispanics, used the Internet for e-mail and

81% of residents not classified into one of these groups used the Internet for e-mail.

Let x = the population of the US at that time.

population of Caucasian was 64% -= 0.4x

population of African - American was 10% = 0.1x

population of Hispanic was 12% -= 0.12x

Percentage of U.S. residents who were Hispanic and used the Internet for e-mail = 77% of all Hispanics.

Total number of Hispanics = 0.12x

Percentage of U.S. residents who were Hispanic and used the Internet for e-mail

= 77/100 × 0.12x = 0.77 × 0.12x

= 0.0924 %