For all your questions, big or small, IDNLearn.com has the answers you need. Our Q&A platform offers reliable and thorough answers to help you make informed decisions quickly and easily.

there are 20 people in a room if they each shake eachothers hands once and only once. how many handshakes are there all together

Sagot :

Answer:

40

Step-by-step explanation:

19 they don’t shake their own hand I think