Multiple choice

What is the probability of picking an orange marble from a bucket containing 12 white, 10 grey and 20 orange marbles?

  1. 10 21

  2. 11 21

  3. 13 21

  4. 17 21

  5. 19 21
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A Correct answer
Explanation

There are 12 + 10 + 20 = 42 marbles in total. The probability of selecting an orange marble is 20/42 = 10/21.

AI explanation

Using the classical definition of probability, the required chance is the number of orange marbles divided by the total number of marbles. The bucket contains 20 orange marbles out of a total of 42 marbles (12 white + 10 grey + 20 orange). The probability is therefore 20 divided by 42, which simplifies to 10/21.

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