If the probability of a player winning a game is 0.79, then the probability of his losing the same game is :

Question

Accepted Answer

## Model Answer **(d) 0.21** P(losing) = 1 − P(winning) = 1 − 0.79 = **0.21** Source: Chapter 14, Section 14.1 (Complementary events: $P(\bar{E}) = 1 - P(E)$) ## Explanation Using the complementary event rule: P(E) + P(not E) = 1. Since P(winning) = 0.79, P(losing) = 1 − 0.79 = 0.21. Options (a) and (b) are incorrect calculations; (c) is wrong as 0.21% ≠ 0.21.

Mathematics — CBSE Class 10 board question