Question

Calculate arithmetic mean from the following
data.
(More then) 85 70 55 40 25 10
(No. Of person) 1 4 30 74 94 100

Answer 1

Step-by-step explanation:

xi L.C.F fi. fi xi

85 1 1 85

70 4 3 210

55 30 26 1430

40 74 44 1760

25 94 20 500

10 100 6 6

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Total 100 3991

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arithmetic mean = sum of ( fi xi ) / sum of fi

= 3991 / 100 = 39.91 (approximately)