A coin is weighted so that the probability of getting heads is 2/3 . Suppose you toss this coin 15 times. Let X represent the number of heads. What are the mean and standard deviation of X?
a. μx=0.67, σx=0.88
b. μx=7.5, σx=2.33
c. μx=7.5, σx=3.33
d. μx=10, σx=1.83
