color in the second generation of a certain cross of sweet peas should be red or white in a 3:1 ratio. That is, each plant has probability 3/4 of having red blossoms, and the blossom colors of separate plants are independent. blickwinkel/Alamy (a) What is the probability that exactly three out of four of these plants have red blossoms? (b) What is the mean number of red-blossomed plants when 60 plants of this type are grown from seeds? (c) What is the probability of obtaining at least 45 red-