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A bag contains some red and green balls ...

A bag contains some red and green balls If we take a ball from it, without looking the probability of getting a red ball is '1/4'
a) What is the total number of balls, if there are 8 red balls?
b) What is the probability that a ball taken is green?
c) Find the sum of both the probabilities
d) From a box containing some red balls and some blue balls the probability of getting a redball is ' a/ b'
What is the probability of getting a blue ball?

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