group odds

[agile topaz]

if theres 10 people in my class and we’re randomly drawing groups of 2. what are the odds of me and my best friend getting the same group?

[agile topaz]

definietly for my class and im not thinking about amongus

[wary remnant]

1/9

Consider just the group that you wind up in. Because which group (1-5) you wind up in doesn't matter, you have a probability of 1 for being selected to that group. Then you have a partner, who is equally likely to be any of the other 9 people. So the total is 1 * 1/9 = 1/9