Question

141
Total
Deviation
.
each prize
(D) The following table shows the area of houses of so families in a city
Area of house
No. of families Class - mark of C.I.
in sq. meter
d=x-a
Classinterval)
40-45
15 - 50
5
50 - 55
7
60 - 65
5
65 - 70
10
If = 50
Total
Ifidi
Taking the class-mark (denoted by 'a') of the interval 50 - 55 as the 'assumed mean, rewrite and
complete the table, and also find the mean of the data.​

Answer 1

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Answer 2

Answer:

I think 25 is right answer