Multiple choice

A bag contains 3 red balls, 5 black balls and 4 white balls. A ball is drawn at random from the bag. What is the probability of not getting a black ball?

  1. 1/4

  2. 5/12

  3. 1/3

  4. 7/12
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total balls = 3 + 5 + 4 = 12. Black balls = 5. Probability of black = 5/12. Probability of not black = 1 - 5/12 = 7/12.

AI explanation

The total number of balls in the bag is 3 red + 5 black + 4 white = 12 balls. The number of non-black balls is 3 red + 4 white = 7 balls. The probability of not getting a black ball is the number of non-black balls divided by the total, which is 7/12.

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