A bag contains 5 white and 7 red balls.

Question:

A bag contains 5 white and 7 red balls. One ball is drawn at random. What is the probability that ball drawn is not black?

Solution:

GIVEN: A bag contains 7 red, and 5 white balls and a ball is drawn at random

TO FIND: Probability that the ball drawn is white

Total number of balls 

Total number of white balls is 5

We know that PROBABILITY = 

Probability of getting a white ball 

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