A manufacturer makes generators. It is observed that out of every 50 made , 4 are usually faulty. If a business man buys 200 generators. What is the probability that the buyer buys a faulty one

Answer 1

The probability of buying a faulty generator is 4 out of 50, or 4/50 = 0.08.

If the buyer buys 200 generators, the expected number of faulty generators is 0.08 * 200 = 16.

Therefore, the probability of the buyer buying a faulty generator out of the 200 he buys is 16/200, or 0.08 or 8%.