An urn contains 10 red and 8 white balls. One ball is drawn at random.

Question:

An urn contains 10 red and 8 white balls. One ball is drawn at random. Find the probability that the ball drawn is white.

Solution:

GIVEN: A bag contains10 red, and 8 white balls

TO FIND: Probability that one ball is drawn at random and getting a white ball

Total number of balls 

Total number of white balls is 8

We know that PROBABILITY = 

Hence probability of getting a white ball is 

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