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CBSE Class 12 Mathematics 2026 Main Paper 65/1/2 · Q201 Marksprobability

CBSE Class 12 Mathematics 2026 Main Paper 65/1/2 · Question 20 (Probability)

Assertion (A): In an experiment of throwing an unbiased die, the probability of getting a prime number given that number appearing on the die being odd is 2/3. Reason (R): For any two events A and B, P(A|B) = P(A∪B)/P(B).

✅ Step-by-Step Solution

Final Answer: (C) A is true and R is false
  1. Assertion true: Odd outcomes {1,3,5}, prime among them {3,5} ⇒ 2/3.
  2. Reason false: Correct formula is P(A|B)=P(A∩B)/P(B).

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All Questions in CBSE Class 12 Mathematics 2026 Main Paper 65/1/2

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