Find the indicated probabilities using the geometric distribution, the Poisson distribution, or the binomial distribution. Then…

Find the indicated probabilities using the geometric
distribution, the Poisson distribution, or the binomial
distribution. Then determine if the events are unusual. If
convenient, use the appropriate probability table or technology to
find the probabilities. Sixty-two percent of parents would give up
cable television to have their child’s education paid for. You
randomly select seven parents. Find the probability that the number
of parents who would give up cable television to have their child’s
education paid for is (a) exactly three, (b) less than four, and
(c) at least three.