GMAT Prep

[thumpin_termis]

Now, the wording of this confused me a tad. I initially thought that some kids developed inflammation, and some developed fever, and they were exclusive of each other. Then the last sentence of the questions asks how many of the children developed inflammation, but not fever, indicating that they could indeed get both at the same time. So I figured:

i = kids with inflammation
f = kids with fever
b = kids with both inflammation and fever

Total kids = i + f - b + neither : the problem sets up the total # of kids, so
1000 = i + f - b + neither

(1) insufficient - we can't find i
1000 = i + f - b + 880

(2) insufficient - we still don't know f
1000 = 20 + f - b + neither

with (1) and (2) combined, we still have:
1000 = 20 + f - b + 880
and can't single out f.

Can anyone help me?

[mschling52]

I agree with you. We know there are 100 with inflammation and 20 with fever, but have no way of knowing how many are in both groups. Therefore, we can't determine how many have only inflammation, so I think the answer would be E.

I've never run into a problem from GMAT Prep having an incorrect answer though, so maybe I am missing something.

[keepsmilinyaar]

I would have thought of E myself but looking at the answer I thought of this.

It does not state in the question that there were cases where "Few had both fever and inflamation" and based on this assumption the answer can be C.

[harry_x1]

Hi,
I have also encountered some problems in gmat prep where the ans seems to be wrong.