question archive Suppose that 86% of the students in a school own a cell phone

Suppose that 86% of the students in a school own a cell phone

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Suppose that 86% of the students in a school own a cell phone. If 5 students are surveyed at random,

a) what is the probability that exactly 3 of these students have cell phones?

b) what is the probability that at least 4 of these students have cell phones?

c) what is the probability that less than 4 of these students have cell phones?

Option 1

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