Question: A manager at a call center notices that 60% of new hires quit within their first year. In a group of 20 new hires, find

A manager at a call center notices that 60% of new hires quit within their first year. In a group of 20 new hires, find the probability that
(a) exactly 15 quit within their first year.
(b) fewer than 19 quit within their first year.

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