According to a nationwide survey, 60% of parents with young children condone spanking their child as a regular form of punishment. (Tampa Tribune, Oct. 5, 2000) Consider a random sample of three people, each of whom is a parent with young children. Assume that x, the number in the sample that condone spanking, is a binomial random variable.
a) What is the probability that none of the three parents condone spanking as a regular form of punishment for their children?
b) What is the probability that at least one condones spanking as a regular form of punishment?