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In a certain year, 88% of all Caucasians in the U.S., 75% of all African-Americans, 75%...

In a certain year, 88% of all Caucasians in the U.S., 75% of all African-Americans, 75% of all Hispanics, and 74% of residents not classified into one of these groups used the Internet for e-mail. At that time, the U.S. population was 68% 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.)

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

=P(hispanic given use the internet)=0.75*0.12/(0.88*0.68+0.75*0.1+0.75*0.12+0.1*0.74)=0.1075~ 10.75% ~ 11.0%

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