ICSE Class X Math 2015 Paper

A bag contains 5 white balls, 6 red balls and 9 green balls. A ball is drawn at random from the bag. Find the probability that the ball drawn is :

Question : 34 of 52

Marks: +1, -0

a white or a red ball

Solution:

P(\text{White or red}) = \frac{5+6}{20}

= \frac{11}{20}

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