MGMAT Advanced Quant Guide PS

[pb]

Set S contains 100 consecutive integers. If the range of the negative elements of set S equals 80, what is the average of the positive numbers?

My question:
Should we not consider 0 as one of the values in the set? Per the solution in the book (chapter 8), its not.
Could you please explain what I am missing here?

Thanks.

[tim]

can you provide a page number? i did not find this problem in chapter 8 of my book. at any rate, 0 will most definitely need to be in the set, and i suspect this fact is implicit somewhere in the solution..

[pb]

Hi Tim, page number 214 (Try-It #8-2). This is a chapter on hybrid problems.
Thanks.

[tim]

yeah, the solution definitely takes 0 into account. we have every integer from -81 to +18, which is 81 negative numbers, 1 zero, and 18 positive numbers for a total of 100 consecutives. the range of the negatives is indeed 80, and the average of the positive values is 9.5..