View Full Version : What is the Probability
kbunch
Dec 2, 2008, 08:57 PM
If P(A)=5/13, what are the odds that event A will occur? ____TO_____
galactus
Dec 13, 2008, 05:11 PM
If the probability of A occurring is 5/13, then the odds is simply 5:18 of it occurring.
ROLCAM
Dec 14, 2008, 02:42 AM
13*12*11*10*9
------------------
5*4*3*2*1
= 13*11*9
= 1,287 to 1.
ebaines
Dec 15, 2008, 09:58 AM
13*12*11*10*9
------------------
5*4*3*2*1
= 13*11*9
= 1,287 to 1.
Rolcam: sorry, but this has nothing to do with what the OP asked. You are showing how to calculate the combination of 13 things taken 5 at a time - for example if you have a deck of 13 cards it's how many ways you can select 5 of them. Nothing at all to do with odds.
visharad
Dec 16, 2008, 01:37 AM
Odds are 5 to 8
P(A) = 5/13
P(not A) = 1 - 5/13 = 8/13
Odds of A occurring = P(A)/P(not A) = 5/8 i.e. 5 to 8
ROLCAM
Dec 16, 2008, 02:00 AM
Rolcam: sorry, but this has nothing to do with what the OP asked. You are showing how to calculate the combination of 13 things taken 5 at a time - for example if you have a deck of 13 cards it's how many ways you can select 5 of them. Nothing at all to do with odds.
Thank you so much for putting the whole thing straight.
Rolcam