At joe’s cafe one cup of coffe and 3 donughts cost 2.80 and two cups of coffee and two doughnuts cost 3.20 you may find it to use this diagram that was used by a student to solve this problem

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.