This season, the probability that the Yankees will win a game is 0.48 and the probability that the Yankees will score 5 or more runs in a game is 0.57 . The probability that the Yankees lose and score fewer than 5 runs is 0.37 . What is the probability that the Yankees win and score 5 or more runs? Round your answer to the nearest thousandth.Answer:
Q. This season, the probability that the Yankees will win a game is 0.48 and the probability that the Yankees will score 5 or more runs in a game is 0.57 . The probability that the Yankees lose and score fewer than 5 runs is 0.37 . What is the probability that the Yankees win and score 5 or more runs? Round your answer to the nearest thousandth.Answer:
Events Denoted: Let's denote the events as follows:W: The Yankees win a game.S: The Yankees score 5 or more runs in a game.L: The Yankees lose a game.F: The Yankees score fewer than 5 runs in a game.We are given the following probabilities:P(W)=0.48P(S)=0.57P(L and F)=0.37We know that the probability of the Yankees losing a game is the complement of the probability of them winning a game. Therefore, we can calculate P(L) as:P(L)=1−P(W)P(L)=1−0.48P(L)=0.52
Calculate P(L): Similarly, the probability of the Yankees scoring fewer than 5 runs is the complement of the probability of them scoring 5 or more runs. So we can calculate P(F) as:P(F)=1−P(S)P(F)=1−0.57P(F)=0.43
Calculate P(F): Now, we want to find the probability that the Yankees win and score 5 or more runs, which is P(W and S). We can use the complement of the event P(L and F) to help us find this probability. Since P(L and F) is the probability of both losing and scoring fewer than 5 runs, the complement will give us the probability of either winning or scoring 5 or more runs. We can express this as:P(W or S)=1−P(L and F)P(W or S)=1−0.37P(W or S)=0.63
Find P(W and S): However, P(W or S) includes all the possibilities of winning (regardless of the number of runs) and scoring 5 or more runs (regardless of winning or losing). To find P(W and S), we need to subtract the probabilities of winning without scoring 5 or more runs and scoring 5 or more runs without winning from P(W or S). This can be expressed as:P(W and S)=P(W)+P(S)−P(W or S)
Substitute and Solve: Substituting the values we have:P(W and S)=0.48+0.57−0.63P(W and S)=1.05−0.63P(W and S)=0.42
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