# A Bag Contains 5 White Balls, 6 Red Balls and 9 Green Balls. a Ball is Drawn at Random from the Bag. Find the Probability that the Ball is Drawn Is: - Mathematics

Sum

A bag contains 5 white balls, 6 red balls and 9 green balls. A ball is drawn at random from the bag. Find the probability that the ball is drawn is:

1) a green ball

2) a white or a red ball

3) is neither a green ball nor a white ball.

#### Solution

Total number of balls = 5 + 6 + 9 = 20

1) Number of green balls 9 Number of favourable cases

∴ P(Green ball) = "Number of favourable cases"/"Total number of balls" = 9/20

2) Number of white balls 5, Number of red balls 6

Number of favourable cases = 5 + 6 = 11

∴ P(White ball or Red ball) = "Number of favourable cases"/"Total number of balls" = 11/20

3) P(Neither green ball nor white ball) P(Red ball)

= "Number of Red balls"/"Total number of balls"

= 6/20 = 3/10

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#### APPEARS IN

Selina Concise Maths Class 10 ICSE
Chapter 25 Probability
Exercise 25 (C) | Q 34 | Page 396