Question

Age of 11 students of class XI is given below. Find the modal age by: (i) Observation Method; (ii) Frequency distribution Method.

Age (in years)

15

16

16

17

15

16

18

17

15

17

17

Answer 1

Age (X)	Tally Marks	Frequency (f)
15 16		3 3
17		4	Modal Class
18		1
		N=11

Since 17 occurs the highest number of times in the series i.e. 4 times.
Hence, Mode = 17