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Joint life functions

how do I go about this? Help..

  • At least one will die within n years

    Votes: 0 0.0%

  • At least two will survive n years

    Votes: 0 0.0%
  • Total voters
    0
V

Verine

Member
The probability that exactly one of three lives aged x will survive for n years is 27 times probability that all three will die within n years.
Find probability that;
a) at least two will survive n years
b) at least one will die within n years
 
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