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3 people with varying age-related mortality rates for a disease. 02%, .04% and .04% respectively. What...

3 people with varying age-related mortality rates for a disease. 02%, .04% and .04% respectively. What is the chances that if all three catch this disease that one of them dies? 1 in ___ chance.

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Answer #1

P(one of them dies) =P(1st , 2nd survive and 3rd dies)+P(1st , 3rdd survive and 2nd dies)+P(2nd , 3rdsurvive and 1st dies)

=(1-0.0002)*(1-0.0004)*0.0004+(1-0.0002)*0.0004*(1-0.0004)+0.0002*(1-0.0004)*(1-0.0004)

=0.000999

or 1 in 1000 chnace

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