Multiple choice

A bag contains 10 black and 20 white balls. One ball is drawn at random. What is the probability that the ball is white?

  1. 1

  2. 2/3

  3. 2/6

  4. 3/7

  5. 1/2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total balls = 10 + 20 = 30. White balls = 20. Probability = 20/30 = 2/3.

AI explanation

Using the classical definition of probability, the total number of balls in the bag is 10 + 20 = 30. The number of favorable outcomes is the 20 white balls. The probability is calculated as the ratio of favorable outcomes to total outcomes, which is 20/30, simplifying to 2/3.

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