In a student body, 50% use Google Chrome, 7% use Internet Explorer, 10% Firefox, 5% Mozilla,...
In a student body, 50% use Google Chrome, 7% use Internet Explorer, 10% Firefox, 5% Mozilla, and the rest use Safari. In a group of 5 students, what is the probability exactly one student is using Internet Explorer and at least 3 students are using Chrome? Report answer to 3 decimals.
Homework Answers
P(exactly one student is using Internet Explorer and at least 3 students are using Chrome)
=P(1 using Internet Explorer, 3 using Chrome and 1 other)+P(1 using Internet Explorer, 4 using Chrome )
=(5!/(1!*3!*1!))*(0.07)*(0.5)3*(0.43)+(5!/(1!*4!))*(0.07)*(0.5)4
=0.097
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