Question

In a group of 33 pupils, 8 play the flute only.

2 play the piano only.
10 play both instruments.
A student is chosen at random.
What is the probability the student plays neither instrument?

Answer 1

1/13 I think but I'm not sure wait it's wrong

Explanation:

add all the pupils who play a instrument which is 20 so u do 33-20=13