Q2 of 18 Page 69

There are 3 red balls and 7 green balls in a bag, 8 red and 7 green balls in another.

i) What is the probability of getting a red ball from the first bag?


ii) From the second bag?


iii) If all the balls are put in a single bag, what is the probability of getting a red ball from it?

Number of red balls in bag 1 = 3


Number of green balls in bag 1 = 7


Number of red balls in bag 2 = 8


Number of green balls in bag 2 = 7



i. Probability of getting red ball from first bag



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ii. Probability of getting red ball from the second bag



⇒


iii. If balls are put together in one bag


Number of red balls = 3 + 8 = 11


Number of green balls = 7 + 7 = 14


Total number of balls = 25


Probability of getting red ball from the bag



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