ICSE Class X Math 2015 Solved 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 : 33 of 52

Marks: +1, -0

a green ball.

Solution:

\;{\;\text " White "\;}/{5} \;\; \;{\;\text " Red "\;}/{6} \;\; \;{\;\text " Green "\;}/{9}

Total no. of balls

=5+6+9=20

\;\text " Probability "\;\;=\;{\;\text " favourable cases "\;}/{\;\text " Total cases "\;}

{\P}(\;\text " Green "\;)\;=\;{9}/{20}

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