The following data give the number of boys of a particular age in a class of 40 students Calculate t...

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Uploaded: 2022-01-05T06:16:12+00:00
Description: R S Aggarwal Solutions - Mathematics - Class 9 Mean Median And Mode Of Ungrouped Data Mean Median And Mode Of Ungrouped Data Exercise 18B solutions written by Lido's expert teachers

Question

The following data give the number of boys of a particular age in a class of 40 students Calculate the mean age of the students

Accepted Answer

We know that Mean age of the students fi xi fi By substituting the values Mean age of the students 69840 1745 years Therefore the mean age of the students is 1745 years

Age (in years)	Frequency (fi)
15	3
16	8
17	9
18	11
19	6
20	3

Age (in years) (xi)	Frequency (fi)	fi xi
15	3	45
16	8	128
17	9	153
18	11	198
19	6	114
20	3	60
	Σ fi = 40	Σ fi xi = 698

RS Aggarwal Solutions Class 9 Mathematics Solutions for Mean Median And Mode Of Ungrouped Data Exercise 18B in Chapter 18 - Mean Median And Mode Of Ungrouped Data