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A binomial random variable $X$ has $n = 10$ trials and success probability $p = 0.3$. Its mean is:
A$10$, the number of trials alone on the school chart
B$0.3$, the success probability alone on the chart here
C$30$, the product of squared trials and probability here
D$3$, since the mean of a binomial is $np = 10\cdot 0.3 = 3$
Answer & Solution
Correct answer: D. $3$, since the mean of a binomial is $np = 10\cdot 0.3 = 3$
Mean of binomial = $np = 10\cdot 0.3 = 3$.
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