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6 February, 10:13

If ten coins are spun together, the probability of four or more heads is 0.83. the probability of eight or more is 0.05. find the probability of:

I) less than four. II) fewer than 8

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  1. 6 February, 12:45
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    a. 0.17

    b. 0.95

    Step-by-step explanation:

    The key to answering both questions is that we should understand that the probability of an event happening = 1 - the probability of the event not happening

    Firstly, we want to calculate the probability of less than four

    Probability of less than four = 1 - probability of four or more heads

    that is 1 - 0.83 = 0.17

    Probability of less than 8 = 1 - probability of 8 or more = 1-0.05 = 0.95
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