The probability that the persons \( P_{1} \) and \( P_{2} \) will die in a year are \( p \) and ...

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The probability that the persons \( P_{1} \) and \( P_{2} \) will die in a year are \( p \) and \( q \) respectively. The probability that at the end of the year only of them will be alive, is equal to .
(A) \( p+q-p q \)
(B) \( p+q-p^{2}-q^{2} \)
(C) \( p+q-2 p q \)
(D) \( \quad p q(p+q-p q) \)
\( \mathrm{P} \)
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