Multiple choice

A box contains 19 balls bearing numbers 1, 2 3, ..........19 a ball is drawn at random from the box. What is the probability that the number on the ball is divisible by 3 ?

  1. $\displaystyle \frac{4}{19}$
  2. $\displaystyle \frac{5}{19}$
  3. $\displaystyle \frac{6}{19}$
  4. $\displaystyle \frac{7}{19}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The numbers divisible by 3 between 1 and 19 are 3, 6, 9, 12, 15, and 18. There are 6 such numbers, so the probability is 6/19.

AI explanation

The total number of possible outcomes is 19. The numbers divisible by 3 between 1 and 19 are 3, 6, 9, 12, 15, and 18, totaling 6 favorable outcomes. Using the basic probability formula of favorable outcomes divided by total outcomes, the probability is 6/19.

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