The marks obtained (out of 100 ) by 40 students in an examination are as under: 35 45 59 67 98 54 30 77 63 75 57 56 68 65 31 95 75 56 68 89 56 55 62 31 88 99 79 42 71 99 49 72 77 52 47 85 69 82 65 42 Prepare a grouped frequency distribution table, 30 - 40 as one group, 40 - 50 second group etc. What is the range?

Given, Minimum height = 30 Maximum height = 99 Range = 99 − 30 = 69 Number of classes = 7 Class range = = 69 7 = 9 . 85 ≈ 10 Class interval Frequency 30 - 40 4 40 - 50 5 50 - 60 8 60 - 70 8 70 - 80 7 80 - 90 4 90 - 100 4 Hence, the range is 69 .

The marks obtained (out of 100 ) by 40 students in an examination are as under: 35 45 59 67 98 54 30 77 63 75 57 56 68 65 31 95 75 56 68 89 56 55 62 31 88 99 79 42 71 99 49 72 77 52 47 85 69 82 65 42 Prepare a grouped frequency distribution table, 30 - 40 as one group, 40 - 50 second group etc. If 40 is the passing marks, how many students have failed?

Given, Minimum height = 30 Maximum height = 99 Range = 99 − 30 = 69 Number of classes = 7 Class range = = 69 7 = 9 . 85 ≈ 10 Class interval Frequency 30 - 40 4 40 - 50 5 50 - 60 8 60 - 70 8 70 - 80 7 80 - 90 4 90 - 100 4 Hence, there are 4 students have failed in the exam.

The marks obtained (out of 100 ) by 40 students in an examination are as under: 35 45 59 67 98 54 30 77 63 75 57 56 68 65 31 95 75 56 68 89 56 55 62 31 88 99 79 42 71 99 49 72 77 52 47 85 69 82 65 42 Prepare a grouped frequency distribution table, 30 - 40 as one group, 40 - 50 second group etc. How many students have secured 75 or more marks?

Given, Minimum height = 30 Maximum height = 99 Range = 99 − 30 = 69 Number of classes = 7 Class range = = 69 7 = 9 . 85 ≈ 10 Class interval Frequency 30 - 40 4 40 - 50 5 50 - 60 8 60 - 70 8 70 - 80 7 80 - 90 4 90 - 100 4 Let's count the numbers above 74 Hence, the required answer is 13 students.

The marks obtained (out of 100 ) by 40 students in an examination are as under: 35 45 59 67 98 54 30 77 63 75 57 56 68 65 31 95 75 56 68 89 56 55 62 31 88 99 79 42 71 99 49 72 77 52 47 85 69 82 65 42 Prepare a grouped frequency distribution table, 30 - 40 as one group, 40 - 50 second group etc. How many students have scored less than 50 % ?

Given, Minimum height = 30 Maximum height = 99 Range = 99 − 30 = 69 Number of classes = 7 Class range = = 69 7 = 9 . 85 ≈ 10 Class interval Frequency 30 - 40 4 40 - 50 5 50 - 60 8 60 - 70 8 70 - 80 7 80 - 90 4 90 - 100 4 Hence, the required answer is 9 students.

The ages (in years) of 30 students of class VIII are as under: 12 13 12 14 14 12 14 13 16 13 15 14 16 13 13 14 16 15 13 14 13 13 14 12 14 12 15 15 13 16 Prepare a frequency distribution table.

Given, Minimum age = 12 Maximum age = 16 Range = 16 − 12 = 4 Age (years) Number of students (Frequency) 12 5 13 9 14 8 15 4 16 4 Hence, this is the required frequency distribution table.

A survey was conducted regarding the number of hours children watched T.V. programmes in last 10 days. The result conducted on interviewing 40 students is as follows: 4 8 15 8 14 6 9 21 16 8 10 4 5 17 13 10 23 13 24 15 6 9 12 6 10 12 11 18 26 29 5 12 10 9 4 14 16 20 15 21 Make a frequency distribution table for the above data taking class width as 5 .

Given, Minimum number of hours = 4 Maximum number of hours = 29 Range = 29 − 4 = 25 Class interval Number of children (Frequency) 1 - 5 5 6 - 10 13 11 - 15 11 16 - 20 5 21 - 25 4 26 - 30 2 Hence, this is the frequency distribution table.

A survey was conducted regarding the number of hours children watched T.V. programmes in last 10 days. The result conducted on interviewing 40 students is as follows: 4 8 15 8 14 6 9 21 16 8 10 4 5 17 13 10 23 13 24 15 6 9 12 6 10 12 11 18 26 29 5 12 10 9 4 14 16 20 15 21 How many children watched T.V. for 20 or more than 20 hours in 10 days?

Given, Minimum number of hours = 4 Maximum number of hours = 29 Range = 29 − 4 = 25 Class interval Number of children (Frequency) 1 - 5 5 6 - 10 13 11 - 15 11 16 - 20 5 21 - 25 4 26 - 30 2 Hence, the required answer is 7 students.

A survey was conducted regarding the number of hours children watched T.V. programmes in last 10 days. The result conducted on interviewing 40 students is as follows: 4 8 15 8 14 6 9 21 16 8 10 4 5 17 13 10 23 13 24 15 6 9 12 6 10 12 11 18 26 29 5 12 10 9 4 14 16 20 15 21 How many children watched T.V. for less than 10 hours?

Given, Minimum number of hours = 4 Maximum number of hours = 29 Range = 29 − 4 = 25 Class interval Number of children (Frequency) 1 - 5 5 6 - 10 13 11 - 15 11 16 - 20 5 21 - 25 4 26 - 30 2 Hence, the required answer is 14 students.

Jagat Jitendra Matto Solutions for Chapter: Data Handling, Exercise 1: EXERCISE 17.1

Author:Jagat Jitendra Matto

Jagat Jitendra Matto Mathematics Solutions for Exercise - Jagat Jitendra Matto Solutions for Chapter: Data Handling, Exercise 1: EXERCISE 17.1

Attempt the practice questions on Chapter 17: Data Handling, Exercise 1: EXERCISE 17.1 with hints and solutions to strengthen your understanding. Step by Step solutions are prepared by Experienced Embibe Experts.

Questions from Jagat Jitendra Matto Solutions for Chapter: Data Handling, Exercise 1: EXERCISE 17.1 with Hints & Solutions

MEDIUM

8th CBSE

IMPORTANT

Step by Step>Chapter 17 - Data Handling>EXERCISE 17.1>Q 3

The marks obtained (out of $100$ ) by $40$ students in an examination are as under:

$35$	$45$	$59$	$67$	$98$	$54$	$30$	$77$	$63$	$75$	$57$	$56$	$68$	$65$
$31$	$95$	$75$	$56$	$68$	$89$	$56$	$55$	$62$	$31$	$88$	$99$	$79$	$42$
$71$	$99$	$49$	$72$	$77$	$52$	$47$	$85$	$69$	$82$	$65$	$42$

Prepare a grouped frequency distribution table, $30 - 40$ as one group, $40 - 50$ second group etc. What is the range?

MEDIUM

8th CBSE

IMPORTANT

Step by Step>Chapter 17 - Data Handling>EXERCISE 17.1>Q 3

The marks obtained (out of $100$ ) by $40$ students in an examination are as under:

$35$	$45$	$59$	$67$	$98$	$54$	$30$	$77$	$63$	$75$	$57$	$56$	$68$	$65$
$31$	$95$	$75$	$56$	$68$	$89$	$56$	$55$	$62$	$31$	$88$	$99$	$79$	$42$
$71$	$99$	$49$	$72$	$77$	$52$	$47$	$85$	$69$	$82$	$65$	$42$

Prepare a grouped frequency distribution table, $30 - 40$ as one group, $40 - 50$ second group etc.

If $40$ is the passing marks, how many students have failed?

MEDIUM

8th CBSE

IMPORTANT

Step by Step>Chapter 17 - Data Handling>EXERCISE 17.1>Q 3

The marks obtained (out of $100$ ) by $40$ students in an examination are as under:

$35$	$45$	$59$	$67$	$98$	$54$	$30$	$77$	$63$	$75$	$57$	$56$	$68$	$65$
$31$	$95$	$75$	$56$	$68$	$89$	$56$	$55$	$62$	$31$	$88$	$99$	$79$	$42$
$71$	$99$	$49$	$72$	$77$	$52$	$47$	$85$	$69$	$82$	$65$	$42$

Prepare a grouped frequency distribution table, $30 - 40$ as one group, $40 - 50$ second group etc. How many students have secured $75$ or more marks?

MEDIUM

8th CBSE

IMPORTANT

Step by Step>Chapter 17 - Data Handling>EXERCISE 17.1>Q 3

The marks obtained (out of $100$ ) by $40$ students in an examination are as under:

$35$	$45$	$59$	$67$	$98$	$54$	$30$	$77$	$63$	$75$	$57$	$56$	$68$	$65$
$31$	$95$	$75$	$56$	$68$	$89$	$56$	$55$	$62$	$31$	$88$	$99$	$79$	$42$
$71$	$99$	$49$	$72$	$77$	$52$	$47$	$85$	$69$	$82$	$65$	$42$

Prepare a grouped frequency distribution table, $30 - 40$ as one group, $40 - 50$ second group etc. How many students have scored less than $50 %$ ?

MEDIUM

8th CBSE

IMPORTANT

Step by Step>Chapter 17 - Data Handling>EXERCISE 17.1>Q 4

The ages (in years) of $30$ students of class VIII are as under:

$12$	$13$	$12$	$14$	$14$	$12$	$14$	$13$	$16$	$13$	$15$	$14$	$16$	$13$	$13$
$14$	$16$	$15$	$13$	$14$	$13$	$13$	$14$	$12$	$14$	$12$	$15$	$15$	$13$	$16$

Prepare a frequency distribution table.

MEDIUM

8th CBSE

IMPORTANT

Step by Step>Chapter 17 - Data Handling>EXERCISE 17.1>Q 5

A survey was conducted regarding the number of hours children watched T.V. programmes in last $10$ days. The result conducted on interviewing $40$ students is as follows:

$4$	$8$	$15$	$8$	$14$	$6$	$9$	$21$	$16$	$8$	$10$	$4$	$5$	$17$
$13$	$10$	$23$	$13$	$24$	$15$	$6$	$9$	$12$	$6$	$10$	$12$	$11$	$18$
$26$	$29$	$5$	$12$	$10$	$9$	$4$	$14$	$16$	$20$	$15$	$21$

Make a frequency distribution table for the above data taking class width as $5$ .

MEDIUM

8th CBSE

IMPORTANT

Step by Step>Chapter 17 - Data Handling>EXERCISE 17.1>Q 5

A survey was conducted regarding the number of hours children watched T.V. programmes in last $10$ days. The result conducted on interviewing $40$ students is as follows:

$4$	$8$	$15$	$8$	$14$	$6$	$9$	$21$	$16$	$8$	$10$	$4$	$5$	$17$
$13$	$10$	$23$	$13$	$24$	$15$	$6$	$9$	$12$	$6$	$10$	$12$	$11$	$18$
$26$	$29$	$5$	$12$	$10$	$9$	$4$	$14$	$16$	$20$	$15$	$21$

How many children watched T.V. for $20$ or more than $20$ hours in $10$ days?

MEDIUM

8th CBSE

IMPORTANT

Step by Step>Chapter 17 - Data Handling>EXERCISE 17.1>Q 5

A survey was conducted regarding the number of hours children watched T.V. programmes in last $10$ days. The result conducted on interviewing $40$ students is as follows:

$4$	$8$	$15$	$8$	$14$	$6$	$9$	$21$	$16$	$8$	$10$	$4$	$5$	$17$
$13$	$10$	$23$	$13$	$24$	$15$	$6$	$9$	$12$	$6$	$10$	$12$	$11$	$18$
$26$	$29$	$5$	$12$	$10$	$9$	$4$	$14$	$16$	$20$	$15$	$21$

How many children watched T.V. for less than $10$ hours?

Jagat Jitendra Matto Solutions for Chapter: Data Handling, Exercise 1: EXERCISE 17.1

Jagat Jitendra Matto Mathematics Solutions for Exercise - Jagat Jitendra Matto Solutions for Chapter: Data Handling, Exercise 1: EXERCISE 17.1

Questions from Jagat Jitendra Matto Solutions for Chapter: Data Handling, Exercise 1: EXERCISE 17.1 with Hints & Solutions

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