Question

Find the mean of the following frequency distribution. marks obtained 5,15,20,35,40,45,50,60. and number of students 7,10,6,8,12,3,5,4 ?​

Answer 1

Answer:

Marks(I)

15-19

20-24

25-29

30-34

35-39

40-44

x

i

17

22

27

32

37

42

f

i

6

5

9

12

6

2

f

i

x

i

102

110

243

384

222

84

x

ˉ

=

∑f

i

∑f

i

x

i

=

40

1145

=57.25

Step-by-step explanation:

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