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Find the mean Class = 25-29 …

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Find the mean Class = 25-29 30-34 35-39 40-44 45-49 50-54 55-59 Frequency = 14, 22, 16, 6, 5 , 3,4

Posted by Sunil Gurjar 4 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 4 years, 10 months ago

et the assume mean A = 42

Classes	Mid value(x₁)	d₁ = x₁ - 42	u1=x1-425	f₁	f₁u₁
25 - 29	27	-15	-3	14	-42
30 - 34	32	-10	-2	22	-44
35 - 39	37	-5	-1	16	-16
40 - 44	42	0	0	6	0
45 - 49	47	5	1	5	5
50 - 54	52	10	2	3	6
55 - 59	57	15	3	4	12
				N = 70	∑f1u1=-79

We have

A = 42, h = 5

Mean =A+h×∑f1u1N

=42+5×-7970

=42+-39570

=42-39570

= 42 - 5.643

= 36.357

0Thank You

ANSWER

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