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At a certain gas station, 30% of all customers use the restroom. What is the probability that, out of the next 10 customers, (a) exactly

At a certain gas station, 30% of all customers use the restroom. What is the probability that, out of the next 10 customers,

(a) exactly 4 will use the restroom?

(b) more than 1 will use the restroom?

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