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Hey M really sorry ,I didn't understand your approach.Could you please explain it furtherLet's break the 3 charities down
>If exactly 4 persons serve on three boards each
1: A B C D _ _ _ _
2: A B C D _ _ _ _
3: A B C D _ _ _ _
>each pair of the charities has 5 persons in common on their boards of directors
1: A B C D E F _ _
2: A B C D F G _ _
3: A B C D E G _ _
The remaining blanks could be distinct people, lets call them: H I J K L M
Thus total number of distinct people = A B C D E F G H I J K L M = 13
Should be (B), whats the OA?
I am going to give it the closest ever look now, just make sure if it's properly copied, just once please!!alivapriyada wrote:Each of the three charities in Novel Grove Estates has got 8 persons serving on its board of directors .If exactly 4 persons serve on three boards each and each pair of the charities has 5 persons in common on their boards of directors, then how many distinct persons serve on one or more boards of directors?
A. 8
B. 13
C. 16
D. 24
E. 27
then (B) and kmittal82 are right, what didn't you get in his approach, by the way?alivapriyada wrote:@Sanju09
yes it is properly copied
