Explain find the probability using binomial distribution.
It is recognised that 60 percent of all registered voters in the 42nd congressional District are Republicans. There registered voters are chosen at random from the district. Calculate the probability that precisely 2 of the 3 selected are Republicans using
a) The rules of probability R, R, NR = R, NR, R = NR, R, R =
b) The binomial formula
c) Compute the variance of a binomial distribution