Math Question
![Use: \( { }_{n} C_{k}=\frac{n !}{k !(n-k) !} \) to solve the combination.
After a band parent meeting, each of the ten members shook hands with
each other once. How many
handshakes were there in all?
Hint Remember that one handshake involves two people.
[?] handshakes](https://d3hlidq5bf9vg0.cloudfront.net/app-server-student/2022/2/7/ea75042b-59a2-48c3-b207-f32d49ec37a3.png "Use: \( { }_{n} C_{k}=\frac{n !}{k !(n-k) !} \) to solve the combination.
After a band parent meeting, each of the ten members shook hands with
each other once. How many
handshakes were there in all?
Hint Remember that one handshake involves two people.
[?] handshakes")
Solution
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