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A study concerning the relative influence of husbands and wives in consumer purchasing, which appeared in recent issue of Time Magazine, reported that husband exerts the primary influence in selecting the make of a new automobile in about 70% of all new-car purchases by families. Suppose four families have decided to buy a new car.
a. What is the probability that in exactly two of the four families the husband will exert the primary influence in choosing the make of a car?
b. What is the probability that the husband will select the make of car in all four families?
c. What is the probability that the husband will exert the primary influence in choosing the make of a car in at least two of the seven families? Use Binomial Table given in Appendix B (Text) for this section.
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