Question

The probability of winning a game is $\frac{2}{5}$, the probability of losing is__. (in decimal form)

Answer 1

Winning or losing a game are complementary events. We know that, for complementary events, P(A) + P(notA) = 1.
Thus, if P(winning) = $\frac{2}{5}$
Then, P(losing) = 1 - $\frac{2}{5}$
$\Rightarrow$ P(losing) = $\frac{3}{5}$ = 0.6.