A large number of groups, each consisting of 12 adults, are selected at random from the population

Question:

A large number of groups, each consisting of 12 adults, are selected at random from the population of a particular town. Given that 30% of the adults in this town are car owners, calculate

(a) the probability that a group contains not more than two car owners,

(b) the mean and the standard deviation of the number of car owners in the groups.

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