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Question

A bag contains 5 red, 8 green and 7 white balls, One ball is drawn at random from the bag. What is the probability of getting a white ball or a green ball?

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Solution

GIVEN: A bag contains5 red, 8 green and 7 white balls

TO FIND: Probability of getting a white ball or a green ball.

Total number of balls=5+8+7=20

Total number of green or white balls=8+7=15

We know that PROBABILITY =Number of favourable eventTotal number of event

Hence probability of getting a green or a white ball =1520=34 .


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