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A Box Contains 7 Red Balls, 8 Green Balls and 5 White Balls. a Ball is Drawn at Random from the Box. Find the Probability that the Ball Is: White - ICSE Class 10 - Mathematics

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Question

A box contains 7 red balls, 8 green balls and 5 white balls. A ball is drawn at random from the box. Find the probability that the ball is: 

white 

Solution

Ttotal number of balls in the box =7+8+5=20 balls 

Total possible outcomes=20=n(s) 

Event of drawing a white ball=E= number of white balls 

Probability of drawing a white ball= `(n(E))/(n(s))=5/20=1/4` 

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Solution A Box Contains 7 Red Balls, 8 Green Balls and 5 White Balls. a Ball is Drawn at Random from the Box. Find the Probability that the Ball Is: White Concept: Type of Event - Complementry.
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