Question

The probability that a man will live 10 more years is 1/4 and the probability that his wife live 10 more year is 1/3. Then the probability that neither will be alive in 10 years, is-

• A. 5/12
• B. ½
• C. 7/12
• D. 11/12

Answer 1

Answer: (B)

½

Answer 2

P( $\overline { \mathrm { A } }$ ).P( $\overline { \mathrm { B } }$ )= $\left( 1 - \frac { 1 } { 4 } \right)$ $\left( 1 - \frac { 1 } { 3 } \right)$ = $\frac { 1 } { 2 }$