NCERT Class 12 · Ch 13 Exercise 13.2 · Q12
NCERT Class 12 Maths · Chapter 13 Probability · Exercise 13.2 Question 12
A fair die is tossed thrice. Find P(an odd number appears at least once).
💡 Concept Hints
- Define the events and identify which event is being conditioned on.
- Use P(E|F)=P(E∩F)/P(F), or separate the possible sources before applying total probability and Bayes.
✅ Step-by-Step Solution
Final Answer: 7/8.
- The complementary event is three even results. Its probability is (3/6)³=1/8 by independent throws.
- Subtract from 1: P=1−1/8=7/8.
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