A box contains 22 widgets 4 of which are defective. If 4 are sold at random find the probability that a all are defective b none are defective

Probability that all 4 are defective is

0.181818181 and the probability that none of them us defective is 0.818181818

Step-by-step explanation:

The question Here says that A box contains 22 widgets 4 of which are defective. If 4 are sold at random find the probability that a all are defective b none are defective

The probability of all 4 widgets sold being defective is 4/22 = 0.181818181

And the probability of all 4 being effective will be

1 - (4/22)

= 9/11 or 0.818181818