There are ten people in the room and everyone shakes hands with everyone else, how many handshakes occurred?
Question
Solution 1
To solve this problem, we can use the formula for combinations in mathematics. The formula is:
nCk = n! / [(n-k)! * k!]
where:
- n is the total number of items,
- k is the number of items to choose,
- "!" denotes a factorial, which means multiplying all positive integers up to that number.
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