2011-09-08, 03:42 AM
just a few things:
1)thanks for the help, really apprecciate it, will try to get this, i got the main trouble out of the way, which was:
2)understanding the probability, i didn't understand why the chance of it activating at least once was so low, after staring at the wiki article for a while i understood it isn't the chance of activating at least but of it activating exactly one time.
lessee about the card example...
n should be 5, since i am drawing 5 cards
r should be 2, since i am trying to get 2 successes (hearts)
p= 4/52 = 1/13
q= 12/13
nCr p^(n-r) q^r
5C2 (1/13)^(5-2) (12/13)^2
5C2 1/2197 144/169
5C2 144/371293
and i'm lost as to what to do with the 5C2 :X
1)thanks for the help, really apprecciate it, will try to get this, i got the main trouble out of the way, which was:
2)understanding the probability, i didn't understand why the chance of it activating at least once was so low, after staring at the wiki article for a while i understood it isn't the chance of activating at least but of it activating exactly one time.
lessee about the card example...
Quote:nCr p^(n-r) q^r
Where n is the number of times something is done
r is the number of successes
p is the chance of success
and q is the chance of failure
n should be 5, since i am drawing 5 cards
r should be 2, since i am trying to get 2 successes (hearts)
p= 4/52 = 1/13
q= 12/13
nCr p^(n-r) q^r
5C2 (1/13)^(5-2) (12/13)^2
5C2 1/2197 144/169
5C2 144/371293
and i'm lost as to what to do with the 5C2 :X