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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

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.

What is the probability that at least 10 will pay in cash?

What is the probability that all 15 will pay in cash?

What is the probability that more than 8 but less than 12 will use cash?

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