1. If X is normally distributed with a mean of 70 and a standard deviation of 7, find
a. P(X less than or equal to 76)
b. P(62
c. the 10th percentile of X
2. A study has shown that 60% of families in a certain area have at least two cars. Find the probabilities that among 15 families
a. 8 have at least two cars
b. More than 10 have at least two cars
c. 6 have fewer than two cars
d. More than 8 have fewer than two cars