Chapter: Probability· Mathematics Part 1 (Algebra)

A bag contains 5 red, 3 white and 2 blue balls of the same size. One ball is drawn at random. Find the probability that the ball drawn is (a) not red (b) white or blue.

Q.26 A bag contains 5 red, 3 white and 2 blue balls of the same size. One ball is drawn at random. Find the probability that the ball drawn is (a) not red (b) white or blue.

Doubtly Asked 29 Oct 2026 Practice test ssc 10th Save WhatsApp Report

1 answer

Best answer

Answer: (a) \(\dfrac{1}{2}\) (b) \(\dfrac{1}{2}\)

Total balls = 5 + 3 + 2 = 10, so n(S) = 10.

(a) Not red: 3 white + 2 blue = 5 balls. \(P(A) = \dfrac{5}{10} = \dfrac{1}{2}\)

(b) White or blue: also 3 + 2 = 5 balls, \(P(B) = \dfrac{5}{10} = \dfrac{1}{2}\). This is the same event as (a), because a ball that is not red must be white or blue.

Doubtly AI · 29 Oct 2026 AI-verified · Nov 2026 Report

Was this answer helpful?

A bag contains 5 red, 3 white and 2 blue balls of the same size. One ball is drawn at random. Find the probability that the ball drawn is (a) not red (b) white or blue.

1 answer

Your answer