Question

at the end of the conference the 10 people present all dhake hands with each other once. how many hands will there be altogether?​

Answer 1

Answer:

45

Step-by-step explanation:

first think that the first person will only be shaking with 9 persons

and the second with 8

third one with7

fourth one with 6

fifth one with 5

sixth on with 4

seventh one with 3

eighth one with 2

and nineth one with 1

no just add these numbers 9+8+7+6+5+4+3+2+1=45