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In a Binomial distribution with n=10, p=0.3, the mean is
A1
B3
C7
D10
Answer & Solution
Correct answer: B. 3
1. Mean of binomial = n × p.
2. = 10 × 0.3 = 3.
3. Variance would be n × p × q = 10 × 0.3 × 0.7 = 2.1.
4. Hence the mean is 3.
_Source: Maharashtra Balbharati Std XII Mathematics & Statistics (Commerce), Ch 8 "Probability Distributions", §8.1 ¶§8.1_
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