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प्रश्न
Fill in the blank :
In Binomial distribution probability of success Remains constant / independent from trial to trial.
उत्तर
In Binomial distribution probability of success _______ from trial to trial.
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संबंधित प्रश्न
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If X ~ B(n, p) with n = 10, p = 0.4, then find E(X2).
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If X∼B (n, p) with n = 10, p = 0.4 then E(X2) = ______.
A pair of dice is thrown 3 times. If getting a doublet is considered a success, find the probability of getting at least two success.
Solution:
A pair of dice is thrown 3 times.
∴ n = 3
Let x = number of success (doublets)
p = probability of success (doublets)
∴ p = `square`, q = `square`
∴ x ∼ B (n, p)
P(x) = nCxpx qn–x
Probability of getting at least two success means x ≥ 2.
∴ P(x ≥ 2) = P(x = 2) + P(x = 3)
= `square` + `square`
= `2/27`
