Shooting is one of the sports listed in the Olympic games. A contestant shoots three times, independently. The probability of hiting the target in the first try is 0.7, in the second try 0.5, and in the third try 0.4. Let X be the discrete random variable representing the number of successful shots among these three.
(a) Find a formula for the piecewise defined function X : ⌦ ! R.
(b) Find the event corresponding to X = 0. What is the probability that he misses all three shots; i.e., Pr(X = 0)?
(c) What is the probability that he succeeds exactly once among these three shots; i.e Pr(X = 1)?
(d) What is the probability that he succeeds exactly twice among these three shots; i.e Pr(X = 2)?
(e) What is the probability that he makes all three shots; i.e Pr(X = 3)?