Ok, so, say we have a magic coin. The coin has a 30% chance to land heads up, a 30% chance to land tails up, and a 40% chance to land on its edge....

Or, a non-fair die that has a 30/30/40 chance of landing on 1,2 or 3 respectively...

If you flip the "Coin" 2 times, what are the chances you will get heads at least once? What are the chances you will get heads both times?

Either way, I was looking onto using the binomial distribution, but this doesn't fit. The criteria are (obviously) that the results:

• are dichotomous (nope)

• are mutually exclusive (yep)

• are independent and (yep)

• are randomly selected (yep)

So.... I was planning on using the equation

P(m of k in s from n) =

_____c(n,k)______

C(s,m)*C(n-s,k-m)

with m=1, k=2, s=30 & n=100

Unfortunately, i have no idea how to actually solve this equation as I am not in any sort of math classes. I know how to do basic algebra and geometry, but I have no idea what to do with a comma in an equation. Can someone please give me a crash course in how to actually use this equation.

Thx,

Cheers