Question

10 defective pens are accidentally mixed with 190 good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability that the pen taken out is a good one.​

Answer 1

Answer:

19/20

Step-by-step explanation:

good pens = 190

defective = 10

Now total pens = 190+10 = 200

P(good pen) = 190/200

= 19/20