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Binomial & Poisson Distributions · Question 30 of 68

What is the mean number of free throws the player scores?

Question 30

EasyOriginal question

A basketball player scores each free throw with probability 0.6, independently of the others, and takes 4 free throws. Let XX be the number scored.

What is the mean number of free throws the player scores?

Options for question 30

Show the answer and explanation
CorrectNot quiteAnswer D

Correct answer: D

Explanation

  1. Mean =np= np.

  2. 4×0.6=2.44 \times 0.6 = 2.4.

Worth noting

1.6 is nqnq, the mean number missed.

Concept
The binomial mean np
Typical time
90 s
Your time
—
The rule this testsMean and variance of a binomial distribution
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