Question

12 defective ball pens are mixed with 132 non-defective ball pens. they all look alike. A ball pen is selected at random from that lot. find the probability that a non-defective ball pen is selected

Answer 1

No. of good pens=132

No. of defective pens=12

Total no. of pens=12+132
=144


p(getting a good pen)=No.of good pens/Total no. of pens

= 132/144
=11/12

Answer 2

Here is your answer mate✔