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This season, the probability that the Yankees will win a game is 0.51 and the probability that the Yankees will score 5 or more runs in a game is 0.57 . The probability that the Yankees win and score 5 or more runs is 0.45 . What is the probability that the Yankees would score 5 or more runs when they lose the game? Round your answer to the nearest thousandth.
Answer:

This season, the probability that the Yankees will win a game is 00.5151 and the probability that the Yankees will score 55 or more runs in a game is 00.5757 . The probability that the Yankees win and score 55 or more runs is 00.4545 . What is the probability that the Yankees would score 55 or more runs when they lose the game? Round your answer to the nearest thousandth.\newlineAnswer:

Full solution

Q. This season, the probability that the Yankees will win a game is 00.5151 and the probability that the Yankees will score 55 or more runs in a game is 00.5757 . The probability that the Yankees win and score 55 or more runs is 00.4545 . What is the probability that the Yankees would score 55 or more runs when they lose the game? Round your answer to the nearest thousandth.\newlineAnswer:
  1. Define Events and Probabilities: Define the events and given probabilities.\newlineLet's denote the events as follows:\newlineWW: The Yankees win a game.\newlineRR: The Yankees score 55 or more runs in a game.\newlineWe are given the following probabilities:\newlineP(W)=0.51P(W) = 0.51 (Probability that the Yankees win)\newlineP(R)=0.57P(R) = 0.57 (Probability that the Yankees score 55 or more runs)\newlineP(W and R)=0.45P(W \text{ and } R) = 0.45 (Probability that the Yankees win and score 55 or more runs)
  2. Calculate Probability of Yankees Losing: Calculate the probability that the Yankees lose a game.\newlineSince the probability of winning is P(W)=0.51P(W) = 0.51, the probability of losing, which we'll call P(L)P(L), is the complement of P(W)P(W).\newlineP(L)=1P(W)P(L) = 1 - P(W)\newlineP(L)=10.51P(L) = 1 - 0.51\newlineP(L)=0.49P(L) = 0.49
  3. Use Conditional Probability Definition: Use the definition of conditional probability.\newlineWe want to find the probability that the Yankees score 55 or more runs given that they lose the game, which is P(RL)P(R|L). According to the definition of conditional probability:\newlineP(RL)=P(R and L)P(L)P(R|L) = \frac{P(R \text{ and } L)}{P(L)}\newlineWe already have P(L)P(L), but we need to find P(R and L)P(R \text{ and } L), which is the probability that the Yankees score 55 or more runs and lose the game.
  4. Find P(R and L)P(R \text{ and } L) Using Complement: Find P(R and L)P(R \text{ and } L) using the complement of the event (W and R)(W \text{ and } R). The event (R and L)(R \text{ and } L) is the complement of (W and R)(W \text{ and } R) within the context of RR. This means that: P(R and L)=P(R)P(W and R)P(R \text{ and } L) = P(R) - P(W \text{ and } R) Substituting the given values, we get: P(R and L)=0.570.45P(R \text{ and } L) = 0.57 - 0.45 P(R and L)=0.12P(R \text{ and } L) = 0.12
  5. Calculate P(RL)P(R|L): Calculate P(RL)P(R|L) using the values from steps 22 and 44.\newlineNow we can substitute P(R and L)P(R \text{ and } L) and P(L)P(L) into the conditional probability formula:\newlineP(RL)=P(R and L)P(L)P(R|L) = \frac{P(R \text{ and } L)}{P(L)}\newlineP(RL)=0.120.49P(R|L) = \frac{0.12}{0.49}\newlineP(RL)0.245P(R|L) \approx 0.245
  6. Round to Nearest Thousandth: Round the answer to the nearest thousandth.\newlineP(RL)0.245P(R|L) \approx 0.245\newlineWhen rounded to the nearest thousandth, this is:\newlineP(RL)0.245P(R|L) \approx 0.245

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