1. The probability of selecting a boy 11/22, so P = 0.5.
2.
a) The probability of taking a blue one is 12/30, so P = 0.4
b) The probability of taking a red one is 7/30, so P = 0.23.
c) The probability of taking a gray one is 5/29, so P = 0.17.
3. She should take a candy from bag B, because P (A) = 0.67 < P (B) = 0.78.
4.
a) The probability that the student had a dog is 9/21, so P = 0.43.
b) The probability that the student had at least a cat is 8/20, so P = 0.4.
5. The probability that the student was under twelve was 25/25, so P = 1.
6. The probability of listening to a ballad is 8/12, so P = 0.67.
HOMEWORK
What is the probability of flipping a coin "heads" three times in a row?
