Mathematics, 18.12.2019 18:31 smariedegray
According to a study, the probability that a randomly selected teenager studied at least once during the week was only 0.52. let x be the number of teenagers who studied at least once during the week. what is the probability that at least 5 of the students in your study group of 10 have studied in the last week?
Answers: 1
![P(X\geq 5)=1-P(X< 5)=1-[0.000649+0.00703+0.0343+0.0991+0.1878]=0.6712](/tpl/images/0424/4290/ac244.png)
![P(X\geq 5)=1-P(X< 5)=1-[P(X=0)+P(X=1)+P(X=2)+P(X=3)+P(X=4)]](/tpl/images/0424/4290/9e94c.png)
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