Mathematics, 17.04.2020 16:18 gulleraliyeva1999

David's gasoline station offers 4 cents off per gallon if the customer pays in cash and does not use a credit card. Past evidence indicates that 40% of all customers pay in cash. During a one-hour period, 15 customers buy gasoline at this station.
(a) What is the probability that more than 8 and less than 12 customers pay in cash?

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