﻿ Statistics NCERT Solutions | CBSE Class 9 Maths Chapter 14

1. Introduction
2. Collection of Data
3. Presentation of Data
4. Graphical Representation of Data
5. Measures of Central Tendency
6. Summary

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Chapter 14 - Statistics

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The ability to describe the data in the various forms is called statistics. Statistics not only makes data look good but also easy to understand. The information has to be organized in a proper manner. This chapter includes making of tables, graphs and pie charts. Statistics simply facilitates the comparison.

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The content in this course includes all the essential points along with the NCERT Solutions for Class 9 Statistics, so you don’t have to worry about the text book questions.

1.      Graphical representation of data

This type of presentation includes drawing of tables with data which is very easy to understand.  There are different types of graphs such as bar graph, histogram, and frequency polygon.

2.      What are the measures of Central Tendency?

Variable usually has a centre point around which the all values lie, and these averages are called measures of central tendency. The most commons are the arithmetic mean, the median and the mode.

3.      How to calculate the mean, mode, and median?

There are different formulas to calculate these all like in mean, the total sum of the observation is divided by the number of observations and then multiplied with 100, and to find mode, the number of frequency is observed.

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1. Q.No 1 - In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the run rate in the remaining 40 overs to reach the target of 282 runs?

6.25

6.5

6.75

7

1/10
2. Q.No 2 - Find the wrong number in the following series. 3252 , 3080 , 2958 , 2876 , 2826

3080

2876

2826

3252

None

2/10
3. Q.No 3 - The angle of elevation of the sun, when the length of the shadow of a tree 3 times the height of the tree, is

30º

45º

60º

90º

None

3/10
4. Q.No 4 - A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?

10/21

11/21

2/7

5/7

None

4/10
5. Q.No 5 - A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?

12 days

15 days

16 days

18 days

None

5/10
6. Q.No 6 - Find the wrong number in the following series. 1250, 1322 , 1452, 1674, 2024 , 2544

1250

1674

2544

2024

None

6/10
7. Q.No 7 - 2442 , 1222 , 614 , 312 ,163 , 90 , 55.75 Look at series carefully and find the wrong number

1222

312

90

614

None of the above

7/10
8. Q.No 8 - Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?

7

10

12

13

None of the above

8/10
9. Q.No 9 - Look carefully for the pattern, and then choose which pair of numbers comes next 9, 16, 23, 30, 37, 44, 51

59,66

58,65

54, 61

56,62

None

9/10
10. Q.No 10 - 1, 2, 3, 5, 8, ?

11

13

15

9

None of the above

10/10