Question

Weekly expenditure of 7 families are :
Rs.600,550,720,890,440,680,880.

Calculate arithmetic mean,using short cut method​

Answer 1

Answer:

680

Explanation:

(600+550+720+890+440+680+880)÷7

= 680

Answer 2

Arithmetic mean of the given data =  680

Given:

Weekly expenditure of 7 families are:

Rs.600, Rs. 550, Rs. 720, Rs. 890, Rs. 440, Rs. 680, Rs. 880.

To find:

Arithmetic mean of the given data

Solution:

Given data Rs.600, Rs. 550, Rs. 720, Rs. 890, Rs. 440, Rs. 680, Rs. 880

As we know the formula for Arithmetic mean of a data is given by

Mean = Sum of observations / Number of observations  

From given data

⇒ Sum of observations = 600+550+720+890+440+680+880 = 4,760

⇒ Number of observations = 7

Mean of the data = 4,760/7 = 680

Arithmetic mean of the given data =  680

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