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If the arithmetic mean of the series, 2, 5, X, 7 is 4, the value of X will be -

Given \(\bar{X} = \frac{2 + 5 + X + 7}{4} = 4 \implies 14 + X = 16 \implies X = 2\).

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If the arithmetic mean of the series, 2, 5, X, 7 is 4, the value of X will be -

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Correct answer A

Given Xˉ=2+5+X+74=4  ⟹  14+X=16  ⟹  X=2\bar{X} = \frac{2 + 5 + X + 7}{4} = 4 \implies 14 + X = 16 \implies X = 2.

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