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The probability that a bulb produced by a factory will fuse after 150 days if used is 0.05. what is the probability that out of 5 such bulbs none will fuse after 150 days of use? a.`1-(19/20)^5` b. `(19/20)^5` c. `(3/4)^5` d. `90(1/4)^5`

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