How to calculate the probability problem?

How should I solve this type of problem? Let's say the probability of one TV to stop working is 0.2, then how to calculate the probabilty that out of 6 TVs none will brake?

  • Answer:

    Turn it around - what's the probability that one TV will NOT stop working? Two would be that number times itself. Three, times itself again. So six would be that number times itself six times.

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