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In Class intervals 1 - 15, 16 - 30, 31 - 45... and so on, the True upper limit of 31 - 45 is ____

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45.5

30.5

31.5

44.5

answer is A.

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Detailed Solution

Gap = 31 - 30 = 1

Half of the gap = ½

Hence the series is rearranged as

30.5 - 45.5

True Upper limit = 45.5

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