Question

(CBSE 2019)
The daily expenses of 40 families has been shown by the following
frequency distribution:
Expenses
500-700
700-900
900-1100 1100-1300 1300-1500
6
10
9
7
Number of
S
families
Find the mean daily expenses.
(CBSE 2015]​

Answer 1

Solution :-

Expenses No. of Families(Fi) Xi FiXi

500-700 6 600 3600

700-900 8 800 6400

900-1100 10 1000 10000

1100-1300 9 1200 10800

1300-1500 7 1400 9800

⅀Fi = 40 ⅀FiXi = 40600

we know that,

• Mean = ⅀FiXi/ ⅀Fi .

therefore,

→ Mean = 40600 / 40

→ Mean = 1015 (Ans.)

Hence, the mean daily expenses of the family is 1015 .

Learn more :-

calculate the median and mode from the following income between (rs)100-200 100-300 100-400 100-500 100-600 no of person...

https://brainly.in/question/23585381

Some students of class X donated for the welfare of old age persons. The contributions are shown in the following distri...

https://brainly.in/question/17314012