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Question
A bag contains 4 red, 5 black and 6 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is Not black
Solution
Total no. of possible outcomes = 15 {4 red, 5 black, 6 white balls}
E ⟶ event of drawing black ball
No. of favourable outcomes = 5 {5 black balls}
P(E) =5/15 =1/3
`barE`⟶ event of not drawing black ball
𝑃`(barE)= 1−1/3`=2/3
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