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If A and B are two events such that P(A)...

If A and B are two events such that P(A) = 3/4 and P(B) = 5/8, then

A

`P(A uu B) ge 3//4`

B

`P(A' nn B) le 1//4`

C

`1//8 le P(A nn B') le 3//8`

D

`3//8le P(A nn B) le 5//8`

Text Solution

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The correct Answer is:
To solve the problem, we need to find the minimum and maximum values of the intersection of two events A and B, given their individual probabilities. ### Step-by-Step Solution: 1. **Identify Given Probabilities**: - We have \( P(A) = \frac{3}{4} \) - We have \( P(B) = \frac{5}{8} \) 2. **Use the Formula for the Union of Two Events**: The formula for the probability of the union of two events is: \[ P(A \cup B) = P(A) + P(B) - P(A \cap B) \] 3. **Determine Maximum Value of \( P(A \cap B) \)**: The maximum value of \( P(A \cap B) \) can be determined by the smaller of the two probabilities: \[ P(A \cap B) \leq \min(P(A), P(B)) \] Since \( P(A) = \frac{3}{4} \) and \( P(B) = \frac{5}{8} \), we find: \[ P(A \cap B) \leq \frac{5}{8} \] 4. **Determine Minimum Value of \( P(A \cap B) \)**: To find the minimum value of \( P(A \cap B) \), we can use the inequality: \[ P(A \cap B) \geq P(A) + P(B) - 1 \] Substituting the values: \[ P(A \cap B) \geq \frac{3}{4} + \frac{5}{8} - 1 \] Converting \( \frac{3}{4} \) to eighths gives \( \frac{6}{8} \): \[ P(A \cap B) \geq \frac{6}{8} + \frac{5}{8} - \frac{8}{8} = \frac{3}{8} \] 5. **Summarize the Results**: From the calculations: - The minimum value of \( P(A \cap B) \) is \( \frac{3}{8} \). - The maximum value of \( P(A \cap B) \) is \( \frac{5}{8} \). ### Final Result: Thus, we conclude that: \[ \frac{3}{8} \leq P(A \cap B) \leq \frac{5}{8} \]

To solve the problem, we need to find the minimum and maximum values of the intersection of two events A and B, given their individual probabilities. ### Step-by-Step Solution: 1. **Identify Given Probabilities**: - We have \( P(A) = \frac{3}{4} \) - We have \( P(B) = \frac{5}{8} \) ...
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