A.) is the correct answer.
The square root of a prime number (11) is irrational
Answer:
19
Step-by-step explanation:
You must calculate how many ways can 2 people be selected from 65.
The formula is:
n! / r! * (n-r)! =
65! / 2! * 63! =
65*64*63! / 2 * 63! =
65*64 / 2 =
2,080 handshakes
Source:
http://www.1728.org/combinat.htm
The first one is 23/30 and the second one is 2 19/24
