A player has a probability of winning a certain game equal to $0.5$. If the player plays the game once, what is the probability that the player loses?

• A. $0$
• B. $0.5$
• C. $0.25$
• D. $1.0$

Answer: (B)

Verified step by step guidance

1. Identify the probability of the player winning the game, which is given as \$0.5$.
2. Recall that the total probability for all possible outcomes must sum to 1.
3. Since the player can either win or lose, these two probabilities must add up to 1.
4. Express the probability of losing as \(P(\text{lose}) = 1 - P(\text{win})\).
5. Substitute the given winning probability into the formula: \(P(\text{lose}) = 1 - 0.5\).