Question

The odds against (E) are 23:77 Find the probability of (not E) :

Answer 1

We can rewrite the question as the probability of getting the event E is 23:77. Find the probability of getting the event not E.

The number 23:77 is a ratio and is it equivalent to:

`(23)/(77)`

To get the probability of the event not-E, we can proceed as follows:

`1-(23)/(77)=(77)/(77)-(23)/(77)=(53)/(77)\approx0.7013`

So the probability for the event not-E is about 53/77 or 0.7013 (or a little more than 70%).