In testing a certain kind of missile, target accuracy is measured by the average distance X (from the target) at which the missile explodes. The distance X is measured in miles and the sampling distribution of X is given by: X 0 10 50 100 Calculate the mean of this sampling distribution. a) O 1316.0 b) O 53.5 P(X) 1/10 1/5 2/5 3/10 c) O 49.5 d) O 52.0 e) O 36.3