Help!!!! How does this work? (1 Viewer)

Epicman69

New Member
In a raffle, the chance of winning a prize is one out of ten. If I purchase twelve tickets, what is the probability of winning exactly two prizes? Stuck on this question please send help!!!

dumNerd

Well-Known Member
In a raffle, the chance of winning a prize is one out of ten. If I purchase twelve tickets, what is the probability of winning exactly two prizes? Stuck on this question please send help!!!
I swear smthung is missing from this

Epicman69

New Member
You don't know sample space how is this question even possible the chances of winning are also variable
idk but the question wants me to use perms and combs but I got stuck

dumNerd

Well-Known Member
idk but the question wants me to use perms and combs but I got stuck
Does it want us to assume that there are 120 people in running to buy it?

Epicman69

New Member
Does it want us to assume that there are 120 people in running to buy it?
Prolly not Idk how it would work, I supposed there would be a 12C2 way of winning from the 12 tickets? but I got stuck from there lol

fan96

617 pages
The question is poorly worded, but if each ticket is for a separate raffle drawing then binomial probability gives

$\bg_white \binom{12}{2} \left(\frac 1{10}\right)^2 \left(\frac 9{10}\right)^{10} \approx 23\%.$

Epicman69

New Member
The question is poorly worded, but if each ticket is for a separate raffle drawing then binomial probability gives

$\bg_white \binom{12}{2} \left(\frac 1{10}\right)^2 \left(\frac 9{10}\right)^{10} \approx 23\%.$
YOU ARE A GENIUS MY MAN DING DING DING YOU GOT IT RIGHT THANK YOU !!!!!!!