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1. A group of researchers has estimated that the probability with which a teacher retires in any given year is 0.3. 1. A school currently

1. A group of researchers has estimated that the probability with which a teacher retires in any given year is 0.3.

1. A school currently has 5 teachers in third grade. What is the probability that 3 of them will retire next year?

2) A school currently has 5 teachers in third grade. What is the probability that most of them will retire next year?

3)A school district has 500 teachers. What is the probability that more than 160 of them will retire next year?

4)What is the probability that a given teacher has retired within the next three years?

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