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

Epicman69 · Dec 8, 2020

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 · Dec 8, 2020

Epicman69 said:
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 · Dec 8, 2020

dumNerd said:
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 · Dec 8, 2020

Epicman69 said:
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 · Dec 8, 2020

dumNerd said:
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 · Dec 8, 2020

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

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

Epicman69 · Dec 8, 2020

fan96 said:
The question is poorly worded, but if each ticket is for a separate raffle drawing then binomial probability gives

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

YOU ARE A GENIUS MY MAN DING DING DING YOU GOT IT RIGHT THANK YOU !!!!!!!

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

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