The question is asking 'how many different ways can we pair two diplomats to shake hand'?
The combination formula is given by:

We have n = 25 and r = 2
Substituting into the formula we have

handshakes
which one do u need help with
Answer:
120
Step-by-step explanation:
5!
=5×4!
=5×4×3×2×1
=120