### Home > CCG > Chapter 6 > Lesson 6.1.1 > Problem6-9

6-9.

Assume that $25\%$ of the student body at your school is male and that $40\%$ of the students walk to school. If the events are independent and a student from this school is selected at random, find the following probabilities.

1. $P(\text{student is female})$

Look at the percentage of the student body that is male.
If the total sum of females and males must be 100%, how much is left for females?

2. $P(\text{student is male and does not walk to school})$

Make an area model.
Where on the table is $P(\text{male and does not walk})$?

 male$0.25$ female$0.75$ walk$0.40$ does not walk$0.60$
3. $P(\text{student walks to school or does not walk to school})$

Where on the table is $P(\text{walk or does not walk})$?

4. Identify the sample space in parts (b) and (c) above as a “union” or a “intersection.”