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Random Variables, Expectation & Variance · Question 5 of 68

Question 5

EasyOriginal question

Two dice are thrown, and XX is the sum of the numbers. How many different values can XX take?

Options for question 5

Show the answer and explanation
CorrectNot quiteAnswer C

Correct answer: C

Explanation

  1. The sum runs from 1+1=21 + 1 = 2 to 6+6=126 + 6 = 12, and every whole number between occurs.

  2. 2, 3, …, 12: 11 values.

Worth noting

36 counts the outcomes; many outcomes share a sum.

Concept
The values of a random variable
Typical time
60 s
Your time
—
The rule this testsRandom variables
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.