Trevor is interested in purchasing the local hardware /sporting goods

store in the small town of Dove Creek, Montana. After examining accounting records for the past several years, he found that the store has been grossing over $850 per day about 70% of the business days it is open. Estimate the probability that the store will gross over $850 for the following.
a) at least 3 out of 5 business dayb) at least 6 out of 10 business days
c) fewer than 5 out of 10 business days
d) fewer than 6 out of next 20 business days

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