Question Answers

6. The marks obtained (out of 100) by a class of 80 students are given below : Construct a histogram to represent the data above. 6. The marks obtained (out of 100) by a class of 80 students are given below : Construct a histogram to represent the data above. July 4, 2021 Category: Chapter [...]

5. The lengths of 62 leaves of a plant are measured in millimetres and the data is represented in the following table : Draw a histogram to represent the data above. 5. The lengths of 62 leaves of a plant are measured in millimetres and the data is represented in the following table : Draw [...]

4. Draw a histogram to represent the following grouped frequency distribution : 4. Draw a histogram to represent the following grouped frequency distribution : July 4, 2021 Category: Chapter 14 - Statistics , Chapter 15 - Probability , Maths , NCERT Class 9 ,

3. Draw a histogram of the following distribution : 3. Draw a histogram of the following distribution : July 4, 2021 Category: Chapter 14 - Statistics , Chapter 15 - Probability , Maths , NCERT Class 9 ,

2. Refer to Q1 above. Construct a grouped frequency distribution table with width 10 of each class, in such a way that one of the classes is 10 – 20 (20 not included). 2. Refer to Q1 above. Construct a grouped frequency distribution table with width 10 of each class in such a way that [...]

1. The following are the marks (out of 100) of 60 students in mathematics. Construct a grouped frequency distribution table with width 10 of each class starting from 0 – 9. 1. The following are the marks (out of 100) of 60 students in mathematics. Construct a grouped frequency distribution table with width 10 of [...]

20. A recent survey found that the ages of workers in a factory is distributed as follows: If a person is selected at random, find the probability that the person is: 20. A recent survey found that the ages of workers in a factory is distributed as follows: If a person is selected at random [...]

19. Over the past 200 working days, the number of defective parts produced by a machine is given in the following table: Determine the probability that tomorrow’s output will have 19. Over the past 200 working days the number of defective parts produced by a machine is given in the following table: Determine the probability [...]

18. Bulbs are packed in cartons each containing 40 bulbs. Seven hundred cartons were examined for defective bulbs and the results are given in the following table: One carton was selected at random. What is the probability that it has 10. Obtain the mean of the following distribution: July 3, 2021 Category: Chapter 14 - [...]

17. Two dice are thrown simultaneously 500 times. Each time the sum of two numbers appearing on their tops is noted and recorded as given in the following table: 17. Two dice are thrown simultaneously 500 times. Each time the sum of two numbers appearing on their tops is noted and recorded as given in [...]