Question

Based on the data in this two-way table, if a girl is randomly selected, what is the probability that she will have above-average grades?

Gender/Grade Below Average Above Average Total

Boy 14 23 37

Girl 16 22 38

Total 30 45 75

Answer 1

The above two way table shows the number of girls and boys who scored below average and above average grades.

We have to find the probability that a randomly selected girl will have above average grades.

Probability is the measure of an likelihood that an event will occur.

Probability is calculated by the formula =
`(Favourable outcomes)/(Total outcomes)`

Total number of girls = 38

Number of girls Girls who have above average grades = 22

P(randomly selected girl with above average grades)=
`(22)/(38)`

= 0.58