Question

15 defective ballpens are accidentally mixed with 135 good ones. It is not possible to just look at a ballpen and say whether it is defective or not. One ballpen is picked up at random from it. Find the probability that the ballpen selected is a good one.

Answer 1

The answer is 9/10 of ball men...
may this have been helped to u

Answer 2

Answer:

Step-by-step explanation:

good pens   135

defeective    +15

                     150

P(A)= no. of out comes favorable to E    =135

          no. of all possible outcomes            150

9/10