Q75.Four fair dice are thrown independently 27 times. Then the expected number of times, at least two dice show up a three or a five, is JEE Main 2020 (05 Sep Shift 1) JEE Main Previous Year Paper
What This Question Tests
The question combines probability calculations for a single trial with the concept of binomial distribution and its expected value, requiring calculation of probability for 'at least two successes'.
Concepts Tested
Formulas Used
P(E) = n(E)/n(S)
P(X ≥ k) = 1 - P(X < k)
Expected value E(X) = n*p
📚 NCERT Sections This Tests
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📋 Question Details
- Chapter
- Probability
- Topic
- Expected value and binomial distribution
- Year
- 2020
- Shift
- 05 Sep Shift 1
- Q Number
- Q75
- Type
- Numerical
- NCERT Ref
- Class 12 Mathematics Ch 13: Probability
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