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Statement-1 : If (1)/(5)(1+5p),(1)/(3)(1...

Statement-1 : If `(1)/(5)(1+5p),(1)/(3)(1+2p),(1)/(3)(1-p) " and " (1)/(5)(1-3p)` are probabilities of four mutually exclusive events, then p can take infinite number of values.
Statement-2 : If A, B, C and D are four mutually exclusive events, then
`P(A), P(B), P(C ), P(D) ge 0`
and `P(A)+P(B)+P(C )+P(D) le 1`

A

Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1.

B

Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for Statement-1.

C

Statement-1 is True, Statement-2 is False.

D

Statement-1 is False, Statement-2 is True.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we need to analyze the two statements provided and verify their correctness step by step. ### Step 1: Analyze Statement 2 Statement 2 states that if A, B, C, and D are four mutually exclusive events, then: - \( P(A), P(B), P(C), P(D) \geq 0 \) - \( P(A) + P(B) + P(C) + P(D) \leq 1 \) **Verification:** - Since probabilities cannot be negative, \( P(A), P(B), P(C), P(D) \geq 0 \) is indeed true. - The sum of probabilities of mutually exclusive events must be less than or equal to 1. Thus, \( P(A) + P(B) + P(C) + P(D) \leq 1 \) is also true. **Conclusion for Statement 2:** Statement 2 is true. ### Step 2: Analyze Statement 1 Statement 1 provides four expressions representing probabilities of mutually exclusive events: 1. \( \frac{1}{5}(1 + 5p) \) 2. \( \frac{1}{3}(1 + 2p) \) 3. \( \frac{1}{3}(1 - p) \) 4. \( \frac{1}{5}(1 - 3p) \) We need to ensure that the sum of these probabilities lies between 0 and 1. **Setting Up the Inequality:** \[ 0 \leq \frac{1}{5}(1 + 5p) + \frac{1}{3}(1 + 2p) + \frac{1}{3}(1 - p) + \frac{1}{5}(1 - 3p) \leq 1 \] ### Step 3: Calculate the Sum of Probabilities 1. **Combine the terms:** \[ \frac{1}{5}(1 + 5p) + \frac{1}{3}(1 + 2p) + \frac{1}{3}(1 - p) + \frac{1}{5}(1 - 3p) \] 2. **Distributing the fractions:** \[ = \frac{1}{5} + p + \frac{1}{3} + \frac{2p}{3} + \frac{1}{3} - \frac{p}{3} + \frac{1}{5} - \frac{3p}{5} \] 3. **Combine like terms:** - Constant terms: \( \frac{1}{5} + \frac{1}{3} + \frac{1}{3} + \frac{1}{5} \) - Coefficient of \( p \): \( 1 + \frac{2}{3} - \frac{1}{3} - \frac{3}{5} \) 4. **Finding a common denominator (15):** - Constant terms: \[ \frac{3}{15} + \frac{5}{15} + \frac{5}{15} + \frac{3}{15} = \frac{16}{15} \] - Coefficient of \( p \): \[ \frac{15}{15} + \frac{10}{15} - \frac{5}{15} - \frac{9}{15} = \frac{11}{15}p \] 5. **Final expression:** \[ \frac{16}{15} + \frac{11}{15}p \] ### Step 4: Set Up the Inequalities Now we need to set up the inequalities: 1. \( \frac{16}{15} + \frac{11}{15}p \geq 0 \) 2. \( \frac{16}{15} + \frac{11}{15}p \leq 1 \) **Solving the First Inequality:** \[ \frac{11}{15}p \geq -\frac{16}{15} \implies p \geq -\frac{16}{11} \] **Solving the Second Inequality:** \[ \frac{11}{15}p \leq 1 - \frac{16}{15} \implies \frac{11}{15}p \leq -\frac{1}{15} \implies p \leq -\frac{1}{11} \] ### Step 5: Conclusion for Statement 1 From the inequalities, we have: \[ -\frac{16}{11} \leq p \leq -\frac{1}{11} \] This interval contains infinitely many values for \( p \). **Conclusion for Statement 1:** Statement 1 is true. ### Final Conclusion Both statements are true, and Statement 2 correctly explains Statement 1.
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