The probability that a bulb produced by ...

The probability that a bulb produced by a factory will fuse after 150 days of use is 0.05. What is the probability that out of 5 such bulbs none will fuse after 150 days of use?

`1-(19/20)^(5)`

`(19/20)^(5)`

`(3/4)^(5)`

`90(1/4)^(5)`

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