At the end of the Red Sox game, the 10 players and 4 coaches each shook hands with one another. Each person shook hands exactly one time with every other person.

Question

At the end of the Red Sox game, the 10 players and 4 coaches each shook hands with

one another. Each person shook hands exactly one time with every other person. please give me exact answer

Answer 1

1 does 0

2 do 1

3 do 3

4 do 4+3= 6

5 do 6+4= 10

6 do 10+5= 15

7 - 15+6= 21

8 - 21+7= 28

9 - 28+8 = 36

10 - 36+9 = 45

11 - 45+10= 55

12 - 55+11= 66

13 - 66+12 = 78

14 do 78+13 = 91 handshakes

s=n(n-1)/2 is the handshake lemma or formula

s14= 14(13)/2=7(13)=91