For this assignment, you submit answors by questions You e required to use a new
ID: 3062019 • Letter: F
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For this assignment, you submit answors by questions You e required to use a new andomization after every 1 question sutmissions Assignment Scoring Your best submission for each entire question is used for your score The manager of a store buys weather radios in lots of 48. Suppose that, on the average, 2 out of each group of 48 are defective. The your answers to 4 decimal places manager randomly selects 4 radios out of the group to test. (Round ) What is the probability that he wil fnd 2 defective radios (b) what is the probability that he wil find no defective radios Need Help? hntua Emme Submt Answer Save Progness 30 tab caps lockExplanation / Answer
a) In a lot of 48, 2 ardefective. 46 are good. To get both defective in the lot of 4, he must choose both defective radios in 2C2 ways = 1 and 2 non defective from 46 in 46C2 ways = 1035.
Therefore favourable outcomes = 1 * 1035 = 1035
Total outcomes = choosing 4 radios out of 48 in 48C4 ways = 194580
Required Probability = 1035/194580 = 0.0053
(b) To get both non defective in the lot of 4, he must choose 0 defective radios in 2C0 ways = 1 and 4 non defective from 46 in 46C4 ways = 163185.
Therefore favourable outcomes = 1 * 163185 = 163185
Total outcomes = choosing 4 radios out of 48 in 48C4 ways = 194580
Required Probability = 163185/194580 = 0.8386
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