EduFarming
Your list · 0हिं

Type at least two letters. Press Esc to close.

↑↓ navigate↵ openTAB cycle filter

Random Variables, Expectation & Variance · Question 34 of 68

Question 34

EasyOriginal question

A fair die is thrown 12 times. What is the expected number of sixes?

Options for question 34

Show the answer and explanation
CorrectNot quiteAnswer A

Correct answer: A

Explanation

  1. Each throw gives a six with probability 16\frac{1}{6}.

  2. Over 12 throws: 12×16=212 \times \frac{1}{6} = 2.

Worth noting

6 is the largest face, not the number of sixes expected.

Concept
The expected value of a count
Typical time
60 s
Your time
—
The rule this testsMathematical expectation
Practise this chapter →

Ten questions from Random Variables, Expectation & Variance, at your own pace.

Practise this chapter →

Ten questions from Random Variables, Expectation & Variance, at your own pace.