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# Selina solutions for Class 10 Mathematics chapter 23 - Graphical Representation

## Chapter 23: Graphical Representation

#### Chapter 23: Graphical Representation solutions [Page 0]

Find the mean of the following set of numbers:

6, 9, 11, 12 and 7

Find the mean of the following set of numbers:

11, 14, 23, 26, 10, 12, 18 and 6

Marks obtained (in mathematics) by 9 student are given below

60, 67, 52, 76, 50, 51, 74, 45 and 56

find the arithmetic mean

Marks obtained (in mathematics) by 9 student are given below:
60, 67, 52, 76, 50, 51, 74, 45 and 56

if marks of each student be increased by 4; what will be the new value of arithmetic mean.

Find the mean of the natural numbers from 3 to 12.

Find the mean of 7, 11, 6, 5, and 6

If each number given in (a) is diminished by 2, find the new value of mean.

If the mean of 6, 4, 7, ‘a’ and 10 is 8. Find the value of ‘a’

The mean of the number 6, ‘y’, 7, ‘x’ and 14 is 8. Express ‘y’ in terms of ‘x’.

The age of 40 students are given in the following table :

 Age (in yrs) 12 13 14 15 16 17 18 Frequency 2 4 6 9 8 7 4

If 69.5 is the mean of 72, 70, ‘x’, 62, 50, 71, 90, 64, 58 and 82, find the value of ‘x’.

The following table gives the hights of plants in centimeter. If the mean height if plants is 60.95 cm; find the value of f.

 Height (cm) 50 55 58 60 65 70 71 no of plants 2 4 10 f 5 4 3

From the data given below . calculate the mean wage, correct to the nnearst rupee.

 category A B C D E F Wages (Rs,day)(x) 50 60 70 80 90 100 no.of workers 2 4 8 12 10 6

(1) If the number of workers in each category is doubled, , what would be the new mean wage?

(2) If the wages per day in each category are incresed  by 60% what is the new mean wages?

(3) If the number of workers in each caategory is doubled is and the wages per day worker are reduced by 40%, what would be the new mean wage?

The content of 100 match  boxes were  checked to detemine the number of matches they contained .

 no of matches 35 36 37 38 39 40 41 no of boxes 6 10 18 25 21 12 8

(1) Calculate, correct to one decimal place, the means number of matches per box .

(2) Determine how many extra matches would have to be added to the the total contents of the total content of the 100 boxes to bring the mean up to exactly 39 matches.

#### Chapter 23: Graphical Representation solutions [Page 0]

The following table givens the age of 50 student of a class . find the arithmetic mean of thier agges.

 Age- Years 16-18 18-20 20-22 22-24 24-26 No.of students 2 7 21 17 3

The following table given the weekly wages of workers in a factory.

 Weekly Wages No.of workers 50-55 5 55-60 20 60-65 10 65-70 10 70-75 9 75-80 6 80-85 12 85-90 8

Calculate the mean by using:

Direct Method

c

c

 c Weekly wages (Rs) No.of workers 50-55 5 55-60 20 60-65 10 65-70 10 70-75 9 75-80 6 80-85 12 85-90 8

Calculate the mean by ussing:

Short-Cut method

The following are the marks obtained by 70 boys in a class test:

 Marks No. of boys 30-40 10 40-50 12 50-60 14 60-70 12 70-80 9 80-90 7 90-100 6

Calculate the mean  by :

Short - cut method

The following are the marks obtained by 70 boys in a class test:

 Marks No. of boys 30-40 10 40-50 12 50-60 14 60-70 12 70-80 9 80-90 7 90-100 6

Calculate the mean  by :

Step - deviation method

Find mean by step- deviation method:

 C.i 63-70 70-77 77-84 84-91 91-98 98-105 105-112 Freq 9 13 27 38 32 16 15

The mean of the following distribution is 21 1/7 . find the value of f

 C.I 0-10 10-20 20-30 30-40 40-50 Freq 8 22 31 f 2

Using step- deviation method , calculate the mean marks of the following distribution.

 C.I 50-55 55-60 60-65 65-70 70-75 75-80 80-85 85-90 Frequency 5 20 10 10 9 6 12 8

Using the information given in the adjoining  histogram, calculate the mean.

If the mean of the following obseervations is 54, find the value of p

 Class 0-20 20-40 40-60 60-80 80-100 Frequency 7 p 10 9 13

The mean of the folowing is 62.8 and the sum of all the frequencies is 50. find the missing frequency f_1 and f_2

 Class 0-20 20-40 40-60 60-80 80-100 100-120 Freq 5 f_1 10 f_2 7 8

## Selina solutions for Class 10 Mathematics chapter 23 - Graphical Representation

Selina solutions for Class 10 Maths chapter 23 (Graphical Representation) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Selina ICSE Concise Mathematics for Class 10 solutions in a manner that help students grasp basic concepts better and faster.

Further, we at shaalaa.com are providing such solutions so that students can prepare for written exams. Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 10 Mathematics chapter 23 Graphical Representation are Median of Grouped Data, Histograms, Ogives (Cumulative Frequency Graphs), Basic Concepts of Statistics, Graphical Representation of Histograms, Graphical Representation of Ogives, Finding the Mode from the Histogram, Finding the Mode from the Upper Quartile, Finding the Mode from the Lower Quartile, Median from the Ogive, Calculation of Inter Quartile Range, Measures of Central Tendency - Mean, Median, Mode for Raw and Arrayed Data.

Using Selina Class 10 solutions Graphical Representation exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Selina Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 10 prefer Selina Textbook Solutions to score more in exam.

Get the free view of chapter 23 Graphical Representation Class 10 extra questions for Maths and can use shaalaa.com to keep it handy for your exam preparation

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