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RS Aggarwal Solutions Class 8 Mathematics Solutions for Probability Exercise 25A in Chapter 25 - Probability

Question 4 Probability Exercise 25A

A bag contains 4 white and 5 blue balls. They are mixed thoroughly and one

ball is drawn at random. What is the probability of getting (i) a white ball? (ii)

A blue ball?

Answer:

i. We know that the bag containing the total balls = 4white + 5blue = 9balls

White balls = 4

By using the formula,

Probability p () = number of favorable outcomes/ total number of outcomes

∴ Probability of getting a white ball p (W) = number of white balls/total number of balls

=4/9

ii. We know that the bag containing the total balls = 4white + 5blue = 9balls

Blue balls = 5

By using the formula,

Probability p () = number of favorable outcomes/ total number of outcomes

∴ Probability of getting a blue ball p (B) = number of blue balls/total number of balls

=5/9

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