3

This topic has expert replies
User avatar
Legendary Member
Posts: 2134
Joined: Mon Oct 20, 2008 11:26 pm
Thanked: 237 times
Followed by:25 members
GMAT Score:730

3

by logitech » Tue Nov 04, 2008 5:46 pm
Recently Mary gave a birthday party for her daughter at which she served both chocolate and strawberry ice cream. There were 8 boys who had chocolate ice cream, and nine girls who had strawberry. Everybody there had some ice cream, but nobody tried both. What is the maximum possible number of girls who had some chocolate ice cream?

(1) Exactly thirty children attended the party.

(2) Fewer than half the children had strawberry ice cream.

OA A
LGTCH
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"

Legendary Member
Posts: 2467
Joined: Thu Aug 28, 2008 6:14 pm
Thanked: 331 times
Followed by:11 members

Legendary Member
Posts: 2467
Joined: Thu Aug 28, 2008 6:14 pm
Thanked: 331 times
Followed by:11 members

by cramya » Tue Nov 04, 2008 6:27 pm
Even though the OA is different I would argue for D) unless someone can provide convincing reasoning

It says fewer than 1/2 had strawberry. I would say let 9 be that number since we are trying to maxmize girls and particularly girls who eat choclate icecream. If [spoiler]OA (A)[/spoiler] tells us this then why not statement II??[/spoiler]

Legendary Member
Posts: 1035
Joined: Wed Aug 27, 2008 10:56 pm
Thanked: 104 times
Followed by:1 members

by scoobydooby » Wed Nov 05, 2008 1:58 am
A

stmnt 1: we have information for 9+8=17 people, 30 attended, so 30-17=13 people can be boys/girls and can have choco/strawberry. if we want the max number of girls who had choco, its possible only if all 13 people were girls and had chocolate. sufficient

stmnt 2: less than 1/2 ate strawberry. no information on total number of attendees.
say 9 had strawberry, so total number of attendees>18
if attendees=19, max girls for chocolate: 2
if attendees=20, max girls for chocolate: 3
we dont have a definite maximum number of girls for chocolate. insufficient

Senior | Next Rank: 100 Posts
Posts: 34
Joined: Wed Jul 09, 2008 6:40 pm
Thanked: 3 times

by lightbulb » Wed Nov 12, 2008 9:48 pm
Regarding Choice (B):

You can cap the number of girls who have Strawberry ice cream at 9.
But what about the boys who had strawberry ice cream? This number is unbounded.
Because the number of kids who had strawberry ice cream is less than half of the total number of kids, this causes the number of children who had chcoloate ice cream to be unbounded. Therfore, the maximum number of girls who had chcoloate ice cream is unbounded.
cramya wrote:Even though the OA is different I would argue for D) unless someone can provide convincing reasoning

It says fewer than 1/2 had strawberry. I would say let 9 be that number since we are trying to maxmize girls and particularly girls who eat choclate icecream. If [spoiler]OA (A)[/spoiler] tells us this then why not statement II??[/spoiler]