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. ﾎｼx=0.67, ﾏベ=0.88
b. ﾎｼx=7.5, ﾏベ=2.33
c. ﾎｼx=7.5, ﾏベ=3.33
d. ﾎｼx=10, ﾏベ=1.83
