Q1 of 47 Page 86

Find the Weighted Arithmetic Mean for the following data:

GIVEN:


FORMULA USED: Weighted Arithmetic mean


=


Let cost of items be x


And number of items be frequency w



∑w = 2 + 4 + 5 + 4


= 15


∑xf = 90 + 48 + 75 + 102


= 315


Weighted arithmetic mean =


Arithmetic mean = = 21


CONCLUSION: Weighted arithmetic mean of given data is Rs21


More from this chapter

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1

The following table shows the weights of12 workers in a factory


Find the mean weight of the workers.

 1

For a month, a family requires the commodities listed in the table below. The weight to each commodity is given. Find the Weighted Arithmetic Mean.

 2

Find the median of the following set of values:

(i) 83, 66, 86, 30, 81.


(ii) 45, 49, 46, 44, 38, 37, 55, 51.


(iii) 70, 71, 70, 68, 67, 69, 70.


(iv) 51, 55, 46, 47, 53, 55, 51, 46.

 2

Find the median for the following data: