BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Permo Combo continues 4

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 1578
Joined: Sun Dec 28, 2008 1:49 am
Thanked: 82 times
Followed by:9 members
GMAT Score:720

Permo Combo continues 4

by maihuna » Sun Aug 09, 2009 10:05 am
A man has 8 different bachelor friends, and he wishes to invite four of them to dinner on successive evenings as long as he can have a different selection each time. For how many of such parties each of the eight friends are from one of the party.

25
35
70
85
90
Charged up again to beat the beast :)
Top
Source: — Problem Solving |
Legendary Member
Posts: 527
Joined: Thu May 01, 2008 12:06 am
Thanked: 7 times

by real2008 » Sun Aug 09, 2009 11:18 am
it is 35
Top
Legendary Member
Posts: 1578
Joined: Sun Dec 28, 2008 1:49 am
Thanked: 82 times
Followed by:9 members
GMAT Score:720

by maihuna » Sun Aug 09, 2009 11:23 am
real2008 wrote:it is 35
how...
Charged up again to beat the beast :)
Top
Legendary Member
Posts: 527
Joined: Thu May 01, 2008 12:06 am
Thanked: 7 times

Re: Permo Combo continues 4

by real2008 » Sun Aug 09, 2009 11:47 am
maihuna wrote:A man has 8 different bachelor friends, and he wishes to invite four of them to dinner on successive evenings as long as he can have a different selection each time. For how many of such parties each of the eight friends are from one of the party.

25
35
70
85
90
from above-mentioned parties each of eight friends will be there- ---that means concerned person is available in the party. so we need to choose another three persons from the rest of seven persons. this can be done by 1 x 7C3 ways i.e. 35ways
Top
Post new topic Post Reply
• Page 1 of 1