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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: Neither Red Nor White. - 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: 

neither red nor white.

Solution

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

Total possible outcomes = 20= n(s) 

Neither red ball nor white ball = green ball 

Event of not drawing a red or white ball =E= number of green ball n(E)=8 

Probability of drawing a white  ball = `(n(E))/(n(S))=8/20=2/5`

  Is there an error in this question or solution?
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APPEARS IN

 Selina Solution for Concise Mathematics for Class 10 ICSE (2020 (Latest))
Chapter 25: Probability
Exercise 25(C) | Q: 7.2 | Page no. 394
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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: Neither Red Nor White. Concept: Type of Event - Complementry.
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