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Mathematics, 09.10.2019 11:30 jwbri

If the probability that a will be alive in 20 years is 0.7 and the probability that b will be alive in 20 years is 0.5, find:
the probability that they both will be alive in 20 years
the probability that only one is alive in 20 years

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If the probability that a will be alive in 20 years is 0.7 and the probability that b will be alive...
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