if each member in a party of 20 friends shakes hand with every one in the party, find the total number of hand shakes.
if each member in a party of 20 friends shakes hand with every one in the party, find the total number of hand shakes.
Answer: If there are 20 people in a party and each person shakes hands with every other person exactly once, we can use the following formula to find the total number of handshakes:
n(n-1)/2
where n is the number of people in the party.
Applying this formula in this case, we get:
20(20-1)/2 = 190
Therefore, there will be a total of 190 handshakes in the party.
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