Question

63 students choose to attend one of three after school activities: football, tennis or running.

There are 38 boys.
20 students choose football, of which 19 are girls.
19 students choose tennis.
5 girls choose running.
A student is selected at random.
What is the probability this student chose running?
Give your answer in its simplest form.

Answer 1

8/21

20 students choose football, 19 choose tennis, and it is out of 63 total.

Therefore, 63-19-20 is the number of runners.

63-19-20=24

The probability is 24/63

Simplified is 8/21!