20% of Kay’s pencils in her pencil case are broken. What is the chance of taking a pencil that is not broken from the case if she picks one at random?
This means 100% - 20% = 80% of pencils are not broken
So the probability of drawing a pencil which is not broken is 80%
This means 100% - 20% = 80% of pencils are not broken
So the probability of drawing a pencil which is not broken is 80%