Six students form a friendship club. Anytime they get together for a meeting each member of the club shakes hands with every other member. How many hand shakes are exchanged before the meeting? A) 6 B) 15 C) 24 D) 30
2007-03-22 14:55:15 · 15 answers · asked by Anonymous in Politics & Government ➔ Elections
B) 15
Give each person a letter designation: a, b, c, d, e, f. No one will shake hands with themself (aa), and no two people need to shake hands twice (ab=ba).
ab, ac, ad, ae, af
bc, bd, be, bf
cd, ce, cf
de, df
ef
or as stated before: 5+4+3+2+1=15
2007-03-22 15:02:43 · answer #1 · answered by Michael E 5 · 1⤊ 0⤋
5 + 4 + 3 + 2 + 1 = 15
2007-03-22 21:59:22 · answer #2 · answered by Anonymous · 1⤊ 0⤋
30
2007-03-22 22:09:15 · answer #3 · answered by holly 7 · 0⤊ 0⤋
15
2007-03-22 21:59:02 · answer #4 · answered by t _la 3 · 1⤊ 0⤋
30
2007-03-22 21:57:57 · answer #5 · answered by Default 3 · 0⤊ 1⤋
Each person shakes 5 hands = 30
2007-03-22 22:17:37 · answer #6 · answered by Nort 6 · 0⤊ 0⤋
Assuming they shake before the meeting standard hand shakes, the first shakes 5, the second 4, and so on to get 15 - B,
But it does not say it's before the meeting, it could be 0, but that's not listed...
2007-03-22 22:09:03 · answer #7 · answered by Hosebeast-ess to be 4 · 1⤊ 0⤋
B) 15.
2007-03-25 22:52:46 · answer #8 · answered by sensekonomikx 7 · 0⤊ 0⤋
I believe each person (6) shakes hands with five others. 6X5 = 30
2007-03-22 22:19:37 · answer #9 · answered by Jacob W 7 · 0⤊ 0⤋
Easy
D) 30
2007-03-22 21:59:10 · answer #10 · answered by sidekickLX! 3 · 0⤊ 1⤋