A salesman has a success rate of 0.77, i.e. the probability that a passerby will buy the product after his salespitch is

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answerhappygod
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A salesman has a success rate of 0.77, i.e. the probability that a passerby will buy the product after his salespitch is

Post by answerhappygod »

A salesman has a success rate of 0.77, i.e. the probability that
a passerby will buy the product after his salespitch is 0.77. What
is the probability that there are 2 or more passersby out of 4
buying the product after his salespitch? Assume the 4 passersby's
decisions are independent of each other.
Answer: P(2 or more passersby out of 4 buying the product after his
salespitch) =
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