Question

If P(1) = 0.65, P(2) = 0.15 then P( $\overline { \mathrm { A } }$ ) + P( $\overline { \mathrm { B } }$ ) =

• A. 1.5
• B. 1.2
• C. 0.8
• D. None of these

Answer 1

Answer: (B)

1.2

Answer 2

P( $\overline { \mathrm { A } }$ ) + P( $\overline { \mathrm { B } }$ ) = [1 – P(1)] + [1 – P(2)]

= 2 – (0.65 + 0.15) = 2 – 0.80 = 1.2