Maths : Probability: Book Back, Exercise, Example Numerical Question with Answers, Solution: Exercise 9.2: Types of Events - Probability

Probability: Types of Events

Exercise 9.2

1. A company manufactures 10000 Laptops in 6 months. Out of which 25 of them are found to be defective. When you choose one Laptop from the manufactured, what is the probability that selected Laptop is a good one.

*Solution:*

2. In a survey of 400 youngsters aged 16-20 years, it was found that 191 have their voter ID card. If a youngster is selected at random, find the probability that the youngster does not have their voter ID card.

*Solution:*

3. The probability of guessing the correct answer to a certain question is *x*/3. If the probability of not guessing the correct answer is *x/*5, then find the value of *x* .

*Solution:*

4. If a probability of a player winning a particular tennis match is 0.72. What is the probability of the player loosing the match?

*Solution:*

5. 1500 families were surveyed and following data was recorded about their maids at homes

A family is selected at random. Find the probability that the family selected has

(i) Both types of maids (ii) Part time maids (iii)No maids

*Solution:*

**Answer:**

**Exercise 9.2 **

1. 0.9975

2. 209/400

3. 15/8

4. 0.28

5.(i) 1/6 (ii) 43/75 (iii) 1/75

Tags : Numerical Problems with Answers, Solution | Probability | Maths , 9th Maths : UNIT 9 : Probability

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9th Maths : UNIT 9 : Probability : Exercise 9.2: Types of Events | Numerical Problems with Answers, Solution | Probability | Maths

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