Yeh the Question is strange, however i found this today in

MGMAT test. And naturally didnt do it right, so thought to check what other people think of such question.

Answer could be explained as follows, however i am not still very convinced or i should say that it is just a 'hidden trap' of gmat.

Attachment:

cs.JPG [ 5.58 KiB | Viewed 2031 times ]
From statement 1- Total = 30 kids.

to maximize, girls eating choclate icecream, boys eating strawberry could be

assumed!! to be 0, since it is not stated that there must be atleast one boy who eats strawberry icecream.

so the max girls eating choclate icecream will be - 30-8-9 = 13 girls.

st-2 doesnt provide info on boys choclate icecream.

-------------------------------------------------

the trap is that one may not assume that boys eating strawberry icecream could be 0, and think that st-1 may not be sufficient.

so in that case both statements would be required.

but the idea is to read the word 'maximum' in the Question.