Question

15 defective ball pens are accidently mixed with 135 good once it is not possible to just look at a ball pen and say whether it is defective or not. One ball pen is picked upcat random from it. Find the probability that the ball pen selected is good one ?​

Answer 1

total outcome =135+15

=150

possible outcome=135

p(e)=135/150

=9/10

Answer 2

hey mate here is your answer