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Coefficient of range of variable series 10, 20, 30, 40, 50, 60 is – (A) 3/2

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Coefficient of range of variable series 10, 20, 30, 40, 50, 60 is –

(A) 3/2

(B) 5/6

(C) 7/5

(D) 5/7

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Answer is (D) 5/7

Coefficient of Range

= (60 - 10)/(60 + 10) = 50/70 = 5/7

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