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Question
A bag contains 5 black, 7 red and 3 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{5 black, 7 red & 3 white balls}
E โถ event of drawing black ball
No. of favourable outcomes = 5 {5 black balls}
P (E) =5/15 =1/3
`barE`โถ ๐๐ฃ๐๐๐ก ๐๐ ๐๐๐ก ๐๐๐๐ค๐๐๐ ๐๐๐๐๐ ๐๐๐๐
P `(barE)`= 1 − ๐(๐ธ)
= 1-(1/3) =2/3
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