The probability that a man aged x years will die in a years is p. The probability that out of n men M1, M2, M3...... Mn each aged n years Mk will die and be the first to die is?

1/n2
1 - (1 - p)n
1/n2[1 - (1- p)n
1/n[1 - (1 - p)n]

Correct Answer: 1/n[1 - (1 - p)n]

Explanation:

∵ Probability that no man out of n men aged x years will die in a year = (1 - p)ⁿ
∴ Probability that out of n men at least one will die in a year = 1 - (1 - p)ⁿ .
When at least one, man dies, any one out of the n men may be the first to die

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