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22 November, 00:06

In one town, 79% of adults have health insurance. what is the probability that 4 adults selected at random from the town all have health insurance? round to the nearest thousandth if necessary.

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  1. 22 November, 02:41
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    The number may be calculated as (0.79) ^4 = 0.3895 ≈ 0.400.

    This is becasue the probability of finding each adult having health insurance is independent of others.

    When, events are independent, the combined probability is the product of each probability = >

    Probailibty of one adult with healt insurance * probability of one adult with healt insurance * probability of one adult with health insurance * probability of one adult with health insurance = 0.79 * 0.79 * 0.79 * 0.79 = (0.79) ^4.

    Answer: 0.400
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