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March 31, 2015

March 31, 2015

Posted by **Danielle** on Sunday, October 6, 2013 at 11:50pm.

(a) They begin each meeting with each member shaking hands with all the other members. No one shakes another member's hand twice. How many handshakes take place?

(b)The professor shakes hands with each member of the seminar and in a different sequence each time. How many sequences of handshakes are possible?

sequences

- Math -
**Reiny**, Sunday, October 6, 2013 at 11:56pma) how about C(7,2) = 21

b) You mean only the prof shakes hands?

And he does it again and again?? Silly question, anyway....

In one specific sequence there are 7 handshakes

if the prof shakes hands with each of the 7 members.

Now if we "arrange" that sequence in all its permutations,

the total number possible sequences = 7! = 5040

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