Suppose you just received a shipment of thirteen televisions. Three of the televisions are defective. If...
Suppose you just received a shipment of thirteen televisions. Three of the televisions are defective. If two televisions are randomly selected, compute the probability that both televisions work. What is the probability at least one of the two televisions does not work?
Homework Answers
In 13 TVs, 3 are defective
a)
2 TVs from 13 can be selected in 13C2 ways
2 non defective TVs from 11 can be selected in 11C2 ways
required probability = 11C2/13C2 = 55/78 = 0.7051
b)
Probability that atleast one of 2 TVs does not work = 1 - P(both work)
= 1- 0.7051
= 0.2949
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