$X$ follows a binomial distribution with $n = 20$ and $p = 0.3$ . What is its mean?

0.3

Correct answerYour answer

4.2

Correct answerYour answer

6

Correct answerYour answer

14

Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer C

Correct answer: C

Worth noting

4.2 is the variance $npq = 20 \times 0.3 \times 0.7$ .

Ten questions from Binomial & Poisson Distributions, at your own pace.

Ten questions from Binomial & Poisson Distributions, at your own pace.

XXX follows a binomial distribution with n=20n = 20n=20 and p=0.3p = 0.3p=0.3. What is its mean?