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Set S contains 100 consecutive integers. If the range of the negative

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GeminiHeat
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Set S contains 100 consecutive integers. If the range of the negative [#permalink] New post   17 Aug 2021, 09:22
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Set S contains 100 consecutive integers. If the range of the negative elements of Set S equals 80, what is the average (arithmetic mean) of the positive numbers in the set?

A. 8

B. 8.5

C. 9

D. 9.5

E. 10
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raf1061
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Re: Set S contains 100 consecutive integers. If the range of the negative [#permalink] New post   20 Aug 2021, 15:06
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As the range of negative values in the set is 80, and the highest value among the negatives will be = -1, then lowest value= -81.
Now, there are 100 elements. So the set is = {-81, -80, ..............., -1, 0, 1, 2,3,.......17,18}
We need average of positive elements only, that is = (9+10)/2 = 9.5
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Re: Set S contains 100 consecutive integers. If the range of the negative [#permalink]
20 Aug 2021, 15:06
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