## GMAT Problem Solving 90: Handshakes and counting

Try this GMAT problem solving question which requires you to count the number of handshakes in a gathering with constraints.

At one of George Washington's parties, each man shook hands with everyone except his spouse, and no handshakes took place between women. If \(13\) married couples attended, how many handshakes were there among these \(26\) people?- \(\quad 78\)
- \(\quad 185\)
- \(\quad 234\)
- \(\quad 312\)
- \(\quad 325\)