Among 17 radios, 8 are defective. An experiment consists of randomly choosing 4 radios. (The order is not important.) Find the probability that all 4 of the chosen radios are defective. Among 17 radios, 8 are defective. An experiment consists of randomly choosing 4 radios. (The order is not important.) Find the probability that all 4 of the chosen radios are defective.