Multiple choice

A box contains 6 black and 4 white balls. Two balls are drawn at random from it, the probability that both the balls are black is _____.

  1. 1/2

  2. 1/3

  3. 2/3

  4. 1/4

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The probability of drawing two black balls is (6/10) * (5/9) = 30/90 = 1/3.

AI explanation

The total number of balls in the box is 6 black plus 4 white, equaling 10 balls. The probability of drawing the first black ball is 6/10, and the probability of drawing a second black ball from the remaining 9 balls is 5/9. Multiplying these probabilities gives (6/10) multiplied by (5/9), which equals 30/90 or 1/3.