4. The records of a department store show that 20% of its customers who make a purchase return the merchandise to exchange it. In the next 6 purchases, a. what is the probability that 3 customers will return the merchandise for exchange? b. what is the probability that 4 customers will return the merchandise for exchange? c. what is the probability that none of the customers will return the merchandise for exchange?
Added by Derrick A.
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We are given that 20% of customers return the merchandise for exchange. So, the probability of a customer returning the merchandise is p = 0.20, and the probability of a customer not returning the merchandise is q = 1 - p = 0.80. Show more…
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