Consider the following discrete probability distribution.
x15 22 34 40
P(X = x) 0.16 0.37 0.26 0.21
a.Is this a valid probability distribution?
Yes/No
c.What is the probability that the random variable X is less than 39? (Round your answer to 2 decimal places.)
d.What is the probability that the random variable X is between 9 and 24? (Round your answer to 2 decimal places.)
e.What is the probability that the random variable X is greater than 20? (Round your answer to 2 decimal places.)





