Multiple choice

A sample space consists of the numbers from 0 to 20. What is the probability that an element of the sample space is an even number, excluding numbers 0 and 20?

  1. 9/20

  2. 9/21

  3. 11/21

  4. 10/21

  5. 10/20
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Here, the sample space is 21 and even numbers between 0 and 20 are {2, 4, 6, 8, 10, 12, 14, 16, 18}, i.e. 9 is the event value. Hence, the probability is 9/21.

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