Probability
Probability
star_batch_jee_advanced_2025
Grade 12
Question:
Four die are thrown simultaneously. The probability that 4 and 3 appear on two of the die given that 5 and 6 have appeared on other two die is:
$1/6$
$1/36$
$12/151$
None of these
Step-by-Step Solution
Key Concept: Use inclusion-exclusion principle to account for dice showing 5 or 6 in the reduced sample space.
When 5 and 6 appear on two dice, the sample space reduces to $6^4 - 2 imes 5^4 + 4^4$ by inclusion-exclusion. With 24 favorable outcomes, the probability is $ rac{24}{302} = rac{12}{151}$.
Correct Answer: 3