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
Answer:
4/7
Step-by-step explanation:
if you add the 3 and the 1 it makes 4, since the denominators are the same you don't add them you keep them the same
I answered the last post, the third option is correct
H the equation has x = 4 and x = -4 as it’s only solutions is true
Answer:
10 weeks
Step-by-step explanation:
205+2t=195+3t
-2t -2t
205=195+t
-195 -195
10=t
