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प्रश्न
A ball is drawn at random from a box containing 12 white, 16 red and 20 green balls. Determine the probability that the ball drawn is red or white.
योग
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उत्तर
Total number of balls in the box = 48
Total possible outcomes on drawing a ball = 48
n(S) = 48
red or a white ball = 12 + 16 = 28 balls
Event of drawing a red or white ball = E = 28
n(E) = 28
Probability of not drawing a green ball = `(n(E))/(n(S)) = 28/48 = 7/12`
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