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Permo Combo continues 4

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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 :)
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by real2008 » Sun Aug 09, 2009 11:18 am
it is 35
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by maihuna » Sun Aug 09, 2009 11:23 am
real2008 wrote:it is 35
how...
Charged up again to beat the beast :)
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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
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