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There are 30 people at a meeting, They each shake hands with everyone. How many
handshakes were there? Hint: Think "The number of combinations of 30 people at a
meeting giving handshakes to each other 2 at a time."

Respuesta :

dunganriley7

Answer:

60 both hand or 30 if only one hand

Step-by-step explanation:

mistsadiya08

Answer:

There were 435 handshakes.

Step-by-step explanation:

If one gives to all others keep cancelling the one who has already given a handshake. So if the first one gives to the other 29 people, the others don't have to give handshake to him again as they have already shaked hands with him.

The process goes like this 29+28+27+26+25+24+23+22+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1

After adding these the answer is 435.

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