Multiple choice

A bag contains twenty discs numbered 1-20. A disc is drawn from the bag. What is the probability that the number on it is a multiple of 3?

  1. 1/10

  2. 3/10

  3. 3/5

  4. 1/5
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B Correct answer
Explanation

Multiples of 3 between 1 and 20 are: 3, 6, 9, 12, 15, 18. There are 6 such numbers. Probability = 6/20 = 3/10.

AI explanation

The probability is calculated by dividing the number of multiples of 3 by the total number of discs. The multiples of 3 between 1 and 20 are 3, 6, 9, 12, 15, and 18, giving 6 successful outcomes. Since there are 20 total discs, the probability is 6/20, which simplifies to 3/10.

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