Question

Calculate AM, GM, and HM from the following data and also find its relationship:

Marks:	0-10	10-20	20-30	30-40	40-50	50-60
No. of students:	5	10	25	30	20	10

Answer 1

X	f	fX	log X	f log X	\(\frac{f}{X}\)
5	5	25	0.6990	3.4950	1.0000
15	10	150	1.1761	11.761	0.6667
25	25	625	1.3979	34.9475	1
35	30	1050	1.5441	46.323	0.8571
45	20	900	1.6532	33.0664	0.4444
55	10	550	1.7404	17.404	0.1818
	N = 100	∑f X = 3300		∑f log X = 146.9969	\(\frac{\Sigma\,f}{X}\) = 4.15