## ronholloway 3 years ago the odds against lounging larry winning the horse race are 5:8. determine the probability that lounging larry wins the horse race.

1. heisenberg

The probability that something happens + the probability that something doesn't happen = 1

2. heisenberg

if the probability that larry doesn't win the horse race is 5/8, what is the probability he wins?

3. ronholloway

13/5

4. heisenberg

that doesn't seem right. it would equals 1 - 5/8

5. heisenberg

1 could also be written as $$\frac{8}{8}$$

6. ronholloway

is it 8/13

7. heisenberg

no, not that either. do you know how to subtract fractions? can you solve: $\frac{8}{8} - \frac{5}{8}$

8. heisenberg

...wait i may be wrong :/ heh

9. heisenberg

if the odds that larry loses are 5:8 then that means the probability he loses is 5/13, I believe. which would make 8/13 correct (what you said initially)

10. heisenberg

because odds means x:y where x is one outcome and y is another. probably is x/y where x is one outcome and y is all possible outcomes.

11. ronholloway

ok got it thanks alot