Question

The marks obtained by 100 students in an examination are given below Marks: 30-35 35-40 40-45 45-50 50-55 55-60 60-65 Number of 14 16 28 23 18 8 3 Students :
Find the mean marks of the students.

Answer 1

Answer:

Mean Marks of Students is 44.8

Step-by-step explanation:

Given: Continuous Distribution table

To find: Mean Marks of Student

Formula used to find Means is given as follows

$Mean,\overline{x}=\frac{\sum xf}{\sum f}$

Table is attached with required calculations.

Thus,

$Mean,\overline{x}=\frac{4930}{110}=44.82$

                   

Therefore, Mean Marks of Students is 44.8

Answer 2

Given : marks obtained by 110 Students in an examination

To Find  : Mean Marks

Solution:

CLASS CLASS MARK (M) f d=(M-47.5)/5 f.d

30-35 32.5                 14 -3 -42

35-40 37.5                  16    -2 -32

40-45 42.5                 28 -1 -28

45-50 47.5                  23 0 0

50-55 52.5                18 1 18

55-60 57.5                        8       2 16

60-65 62.5                 3 3 9

                               110  -59

Mean = 47.5 + 5 * (-59)/110

= 47.5 - 2.682

= 44.818

44.818  is the mean marks.

Learn More

The mean and median of the data x+a, x+b, x+c are equal and a less ...

brainly.in/question/2870143

Find the mean and median of 10 47 3 9 17 4 27 48 12 15 - Brainly.in

brainly.in/question/8882216