Question

Q. 20. A lot consists of 144 ball pens of which 20 are
defective and the others are good. Nuri will buy a pen if
it is good, but will not buy it if it is defective. The
shopkeeper draws one pen at random and gives it to
her. What is the probability that
(i) She will buy it?
(ii) She will not buy it ?
[H.B. 2016]​

Answer 1

Answer:

Step-by-step explanation:

Sample space = 144

No of defective pens = 22

Therefore no. good pens = 144 - 22 = 122

Probability of picking a good pen = 122/144 = 61/72

Probablity of picking a defective pen = 22/144 = 11/72

Hope it helps

Mark as brainliest ;)

Answer 2

Answer:

help kese kru ...........