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A bag contains 5 white and 7 red balls. One ball is drawn at random. What is the probability that ball drawn is white?

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Total numbers of red balls = 7 

Number of white balls = 5 

Total number of Non red balls = 7 + 5 = 12 

Probability of getting a non black ball is = \(\frac{Total\,number\,of\,white\,balls}{Total\,number\,of\,balls}\) = \(\frac{5}{12}\)

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