Ruasha
contestada

At a place 11 Friends met together and they shook their hands. how many hand-shakings did they do?​

Respuesta :

Answer:

121

Step-by-step explanation:

Because every one of them shook with each other and one person shook 11 times so 11 into 11 is 121.

Noorjahan2008

Answer:

55 handshakes.

Step-by-step explanation:

  n(n-1)

   ----------

         2

= 11(11-1) / 2

= 11* 10 / 2

= 110 / 2

= 55

Otras preguntas