Sixty percent of all children in a school do not have cavities. The probability, rounded to...
Sixty percent of all children in a school do not have cavities. The probability, rounded to four decimal places, that in a random sample of 9 children selected from this school, at least 5 do not have cavities is:
Homework Answers
This will be a binomial distribution with parameters:
n = 9, p = 0.60
Hence,
P(Atleast 5)
= 1 - P(Less than 5)
= 1 - P(Less than or equal to 4)
= 1 - binom.dist(4, 9, 0.60, True) [Excel Formula]
= 0.7334
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