# A bag contains 10 red, 5 blue and 7 green balls. A ball is drawn at random. Find the probability of this ball not a blue ball

**Solution:**

Given, a bag contains 10 red, 5 blue and 7 green balls.

A ball is drawn at random.

We have to find the probability of getting a red ball, green ball and not a blue ball.

Possible outcomes = 10 red ball + 5 blue ball + 7 green ball

Total number of possible outcomes = 10 + 5 + 7 = 22

The probability of the ball not being a blue ball is given by

There are 10 red balls, 7 green balls and 5 blue balls.

Favourable outcomes = 10 red balls + 7 green balls

Number of favourable outcomes = 17

Number of possible outcomes = 22

Probability = number of favourable outcomes / number of possible outcomes

Probability = 17/22

Therefore, the probability of getting a ball not being a blue ball is 17/22.

**✦ Try This: **A bag contains 10 red, 5 blue and 7 green balls. A ball is drawn at random. Find the probability of this ball being a blue ball.

**☛ Also Check: **NCERT Solutions for Class 10 Maths Chapter 14

**NCERT Exemplar Class 10 Maths Exercise 13.3 Problem 27(iii)**

## A bag contains 10 red, 5 blue and 7 green balls. A ball is drawn at random. Find the probability of this ball not a blue ball

**Summary:**

A bag contains 10 red, 5 blue and 7 green balls. A ball is drawn at random. The probability of this ball not a blue ball 17/22

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