Question

the following table gives the number of pages written by Sarika for completing her own book for 30 days :
Number of Number of
pages written days
per day
$16 - 18 \: \: \: \: \: \: \: \: \: 1 \\ 19 - 21 \: \: \: \: \: \: \: \: 3 \\ 22 - 24 \: \: \: \: \: \: \: \: 4 \\ 25 - 27 \: \: \: \: \: \: \: \: 9 \\ 28 - 30 \: \: \: \: \: \: \: \: 13$
Find the mean number of pages written per day. ​

Answer 1

Answer:

Solution :-

Pages No. of Days.(fi) xi fixi

16-18 1 17 17

19-21 3 20 60

22-24 4 23 92

25-27 9 26 234

28-30 13 29 377

Total ⅀fi = 30 ⅀fixi = 780

Therefore,

→ Mean = (⅀fixi) / (⅀fi)

→ Mean = 780 / 30

→ Mean = 26 .(Ans.)

Hence, Required Mean is 26.

Answer 2

Answer:

$\huge \tt \gray{\underline{Solution :-}}$

[Sorry miskates in my answer ⤴️

see above answer it's better]

Pages No. of Days.(fi) xi fixi

16-18 1 17 17

19-21 3 20 60

22-24 4 23 92

25-27 9 26 234

28-30 13 29 377

Total ⅀fi = 30 ⅀fixi = 780

Therefore,

→ Mean = (⅀fixi) / (⅀fi)

→ Mean = 780 / 30

→ Mean = 26

• Hence, Required Mean is 26.

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