Home
Class 9
MATHS
Find the mean of the marks obtained by 3...

Find the mean of the marks obtained by 30 students of Class IX of aschool, given in Example 2.10 20 36 92 95 40 50 56 60 7092 88 80 70 72 70 36 40 36 40 92 40 50 50 56 60 70 60 60 88

Text Solution

AI Generated Solution

To find the mean of the marks obtained by 30 students, we will follow these steps: ### Step 1: List the marks The marks obtained by the students are: 20, 36, 92, 95, 40, 50, 56, 60, 70, 92, 88, 80, 70, 72, 70, 36, 40, 36, 40, 92, 40, 50, 50, 56, 60, 70, 60, 60, 88 ### Step 2: Calculate the sum of the marks We need to add all the marks together. ...
Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    NCERT ENGLISH|Exercise EXERCISE 14.3|9 Videos

  • STATISTICS

    NCERT ENGLISH|Exercise EXERCISE 14.1|2 Videos

  • STATISTICS

    NCERT ENGLISH|Exercise Exercise 14.2|9 Videos

  • QUADRILATERALS

    NCERT ENGLISH|Exercise Exercise 8.2|7 Videos

  • SURFACE AREAS AND VOLUMES

    NCERT ENGLISH|Exercise Exercise 13.9|3 Videos

Similar Questions

Explore conceptually related problems

Consider the marks obtained (out of 100 marks) by 30 students of Class IX of a school: 10 20 36 92 95 40 50 56 60 7092 88 80 70 72 70 36 40 36 4092 40 50 50 56 60 70 60 60 88 Recall that the number of students who have obtained a certain number of marks is called the frequency of those marks. For instance, 4 students got 70 marks. So the frequency of 70 marks is 4. To make the data more easily understandable, tabulate the data.

The marks in science of 80 students of class X are given below: Find the mode of the marks obtained by the students in science. Marks: 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100 Frequency: 3 5 16 12 13 20 5 4 1 1

Given below are the marks obtained by 40 students in an examination : 40 56 24 41 51 22 59 12 26 46 51 14 23 59 58 29 41 35 36 40 42 43 36 33 38 52 23 24 13 55 18 54 20 57 30 24 43 50 26 15 Taking class intervals 10-20, 20-30,. ...., 50-60 , construct a frequency table for the above distribution.

Consider the marks, out of 100, obtained by 51 students of a class in a test, given in Table 14.9. M a r k sN u m b e r\ o f\ S t u d e n t s0-10 5 10-20 10 20-30 4 30-40 6 40-50 7 50-60 3 60-70 2 70-80 2 80-90 3 90-100 9Tot a l 51 Draw a frequency polygon corresponding to this frequency distribution table.

Find the mode of the following distribution of marks obtained by 80 students: Marks obtained 0-10 10-20 20-30 30-40 40-50 No. of students 6 10 12 32 20

Find the mode of the following distribution of marks obtained by 80 students: Marks obtained 0-10 10-20 20-30 30-40 40-50 No. of students 6 10 12 32 20

Find the mode of the following distribution of marks obtained by 80 students: Marks obtained 0-10 10-20 20-30 30-40 40-50 No. of students 6 10 12 32 20

Following are the marks obtained, out of 100, by two students Ravi and Hashina in 10 life? Ravi: 25 50 45 30 70 42 36 48 35 60 Hashina: 10 70 50 20 95 55 42 60 48 80 .Who is more intelligent and who is more consistent?

Find the mode of the following frequency distribution of marks obtained by 50 students. Marks obtained 0−10 10−20 20−30 30−40 40−50 No. of students 5 12 20 10 3

The marks obtained by 12 students in an examination (out of 50) are given below: 18, 35, 2, 27, 40, 0, 21, 33, 27, 8, 36, 23 Find the mean marks.