Practical Mathematics for Grade 12, Problem ID: 954

Practical Mathematics K12A space rocket has a critical fuel-control system protected by 4 fuel micro-controllers running together. If all 4 micro-controllers fail during the flight, the rocket will crash. The probability that any one micro-controller will fail is 1/5.

If the rocket has lifted off, what is the probability that it will not crash due to the fuel-control system?


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