Mat 318
Homework 2 : Chapter 4

4-2 # 1,2,3,7,9,11
4-3 # 13, 15, 17, 19

Sect. 4-5# 15, 17

1. About 12.6 % of men and  9.9 % of women are left-handed. According to Census Bureau, 51% of US population are female. Suppose you select a person at random.

a)      What is the probability that it is a left-handed woman?

b)      What is the probability that it is a left-handed person?

c)      If you pick a left-handed person at random, what is the probability that it is a woman?

2. The Jones family has three children. Assume that boys and girls are equally likely.

a)      If at least one of them is a boy, what is the probability that all 3 are boys?

b)      If the youngest one is a boy, what is the probability that all 3 are boys?