ConceptProbability Examples and Solutions

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#### Question

A bag contains, white, black and red balls only. A ball is drawn at random from the bag.If the probability of getting a white ball is 3/10 and that of a black ball is 2/5 then find the

probability of getting a red ball. If the bag contains 20 black balls, then find the total number of balls in the bag.

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#### Reference Material

Solution for concept: Probability Examples and Solutions. For the course CBSE