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Question

A bag contains 6 white balls numbered from 1 to 6 and 4 red balls numbered from 7 to 10.
A ball is drawn at random. Find the probability of getting:
(i) An even numbered ball
(ii) A white ball

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Solution

Number of white balls =6
Number of red balls =4
Total number of balls =10
Thus, n(S)=10
Let A be event of getting number in even ball.
A={2,4,6,8,10}
n(A)=5
P(A)=n(A)n(S)=510=12
Let B be event of getting white ball
n(B)=6
P(B)=n(B)n(S)=610=35

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