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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 - ICSE Class 10 - Mathematics

ConceptType of Event - Complementry

#### Question

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

#### 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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Solution 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 Concept: Type of Event - Complementry.
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