There are 5 green, 6 black and 7 white balls in a bag.A ball is drawn at random from the bag.Find the probability that it is not white.
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11/18
Step-by-step explanation:
Total balls = 5 + 6 + 7= 18.
The event of Selecting a ball at random from 18 balls = 18 C 1 =18
The selected ball should not be white hence it should be from any of 5 green or 6 black balls = (6+5)=11 balls.
Hence event of 1 ball to be selected from 11 balls = 11 C 1. = 11
Probability that ball is not white=
Selecting any ball other than white / Total selection
= 11/18
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