Question

span >25 defective pens are accidentally mixed with 130 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 is taken out is a good one.

A 0.865
B 0.870
C 0.833
D 0.838
E None of these
Practice Next

Hey! Ask a query