Question

There are 40 people at Drake's sweet sixteen party. Drake's only rule is that everyone in the party must meet and shake each others hand. If all 40 guest shake each other's hand once and only once.
(1) How many handshakes are there altogether? (50 pts)
(2) How did you get your solution? (30 pts)
(3) What's the quickest way to figure this out if Drake invited 1000 people? (20 pts)
PLEASE EXPLAIN 3.

Answer 1

Answer:

1 is 1600

Step-by-step explanation:

Because 40 people and each person shakes each other hands so its 1600