Multiple choice

A ball is drawn from a box containing $6$ red balls, $4$ blue and $5$ green. Calculate What is the probability that the ball will be red or white?

  1. $\dfrac{10}{15}$
  2. $\dfrac{11}{15}$
  3. $\dfrac{9}{15}$

  4. none of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total balls = 6 + 4 + 5 = 15. Probability of red = 6/15. Probability of white = 0/15 (no white balls mentioned). Probability of red or white = 6/15 = 2/5. Since 2/5 is not listed, 'none of these' is correct.

AI explanation

The box contains 6 red, 4 blue and 5 green balls, giving a total of 15 balls. The probability formula requires the number of favorable outcomes divided by the total possible outcomes, but there are zero white balls in the box. The probability of drawing a red or white ball is 6 divided by 15, which is 2 divided by 5. This fraction is not listed among the provided options, so the correct result is none of these.

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