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cavejr87
25.06.2019 •
Mathematics
Alocal community college determines the probability that a student will reenroll for a second year is 0.91. a representative surbeys 100 random first year students and asks them if they will be enrolling for the next year. what is the probability that exactly 91 of them wil enroll?
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Ответ:
The probability is 0.1381, or about 13.8%
Step-by-step explanation:
The probability of a count k out of n with a known event probability p is described by the binomial distribution:
We are given n=100, p=0.91 and are asking for the probability of seeing exactly k=91 positive events (enrollment), so:
Ответ: