Page 40 - Probability Demystified

CHAPTER 2 Sample Spaces 29

3.

Fig. 2-7.

There are nine outcomes in the sample space.
2
a. Pð$6Þ¼ since $1+$5, and $5+$1 equal $6.
9 5
b. Pðgreater than $10) ¼ since there are five ways to get a sum
greater than $10. 9
6 2
c. Pðless than $15) ¼ ¼ since there are six ways to get a sum lesser
than $15. 9 3
4.

Fig. 2-8.
There are eight outcomes in the sample space.
1
a. Pð3 girls) ¼ since three girls is GGG.
8 3
b. P(2 boys and one girl in any order) ¼ since there are three ways
8
to get two boys and one girl in any order. They are BBG, BGB,
and GBB.