Q1 of 33 Page 156

Find the arithmetic mean of the sales per day in a fair price shop in a week.

Rs. 10000, Rs. .10250, Rs. .10790, Rs. .9865, Rs. .15350, Rs. .10110

Given, observations 10000, 10250, 10790, 9865, 15350, 10110

Clearly, No of observations, n = 6


We know,


Arithmetic mean of x1, x2, x3, …, xn (n observations) is



Therefore, mean of above data




Hence, mean is Rs. 110060.83


More from this chapter

All 33 →
2

Find the mean of the data;10.25, 9, 4.75, 8, 2.65, 12, 2.35

 3

Mean of eight observations is 25. If one observation 11 is excluded, find the mean of the remaining.

 4

Arithmetic mean of nine observations is calculated as 38. But in doing so, an observation 27 is mistaken for 72. Find the actual mean of the data.

 5

Five years ago mean age of a family was 25 years. What is the present mean age of the family?