1. If 2 people who do not study together take the course described in find:
a. P(2 A's)
b. P(same grade)
c. P(different grades)
d. P(both higher than D)
e. P(both fail)
f. P(one passes and one fails)
2. In a certain city, a fourth of the families take their children to the doctor for regular checkups. Five families are chosen at random.
a. What is the probability that exactly 3 families out of the 5 take their children to the doctor for regular checkups?
b. What is the probability that at most 2 families out of the 5 take their children for regular checkups?
c. What is the probability that more than 1 family out of the 5 take their children?