Try the following ACT math practice question that tests your understanding of principles of counting when applied to the number of handshakes at a gathering.
A total of $28$ handshakes was exchanged at the conclusion of a gathering. Assuming that each participant shook hands with every other participant, the number of people present was:
- $\quad 56$
- $\quad 28$
- $\quad 14$
- $\quad 8$
- $\quad 7$
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