The marks obtained out of 50, by 102 students in a Physics test are given in the frequency table below:

Marks (x): 15 20 22 24 25 30 33 38 45

Frequency (f): 5 8 11 20 23 18 13 3 1

Find the average number of marks.

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Solution

Let the assume mean be.

We know that mean,

Now, we have .

Putting the values in the above formula, we get

Hence, the average number of marks is 26.08.

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Similar questions

Q. The marks obtained out of 50, by 102 students in a Physics test are given in the frequency table below:
Marks (x) : 15 20 22 24 25 30 33 38 45
Frequency (f) : 5 8 11 20 23 18 13 3 1
Find the average number of marks.

Q. The marks obtained out of

50

, by

102

students in a Physics test are given in the frequency table below:

Marks ( $x$ )	$15$	$20$	$22$	$24$	$25$	$30$	$33$	$28$	$45$
Frequency ( $f$ )	$5$	$8$	$11$	$20$	$23$	$18$	$13$	$3$	$1$

Find the average mark.

The marks obtained out of 50, by 102 students in a Physics test are given in the frequency table below:
Marks (x) : 15 20 22 24 15 30 33 38 45
Frequency (f) : 5 8 11 20 23 18 13 3 1
Find the average number of marks.

Q. The frequency distribution of marks obtained by students in a class test is given below:

Marks	:	0-10	10-20	20-30	30-40	40-50
No. of Students	:	3	10	14	10	3

Draw a histogram to represent the frequency distribution of marks . Comment on the shape of the histogram.

Q. The following table shows the marks obtained by students of a class in a math test (out of 10 marks).

Maximum number of students got marks.

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The marks obtained out of 50, by 102 students in a Physics test are given in the frequency table below: Marks (x): 15 20 22 24 25 30 33 38 45 Frequency (f): 5 8 11 20 23 18 13 3 1 Find the average number of marks.

Let the assume mean be. We know that mean, Now, we have . Putting the values in the above formula, we get Hence, the average number of marks is 26.08.

The marks obtained out of 50, by 102 students in a Physics test are given in the frequency table below:

Marks (x): 15 20 22 24 25 30 33 38 45

Frequency (f): 5 8 11 20 23 18 13 3 1

Find the average number of marks.

Let the assume mean be.

We know that mean,

Now, we have .

Putting the values in the above formula, we get

Hence, the average number of marks is 26.08.