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A Ball is Drawn at Random from a Box Containing 12 White, 16 Red and 20 Green Balls. Determine the Probability that the Ball Drawn Is: Not Green - Mathematics

A ball is drawn at random from a box containing 12 white, 16 red and 20 green balls. Determine the probability that the ball drawn is: 

not green 

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Solution

Total number of balls in the box=48 

Total possible outcomes on drawing   a ball=48 

n(s)=48   

Event of  drawing a green ball=E=2

n(E)=20  

Probability of drawing a  green ball =`(n(E))/(n(s))=20/48=5/12` 

Probability of not drawing a green ball =`1-5/12 =(12-5)/12=7/12`

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APPEARS IN

Selina Concise Maths Class 10 ICSE
Chapter 25 Probability
Exercise 25 (B) | Q 11.3 | Page 393
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