In a certain year, 89% of all Caucasians in the U. S., 77% of all African-Americans, 77% of all Hispanics, and 82% of residents not classified into one of these groups used the Internet for e-mail. At that time, the U. S. population was 66% Caucasian, 10% African-American, and 13% Hispanic. What percentage of U. S. residents who used the Internet for e-mail were Hispanic

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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