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:

$\frac{23}{77}$

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

$1-\frac{23}{77}=\frac{77}{77}-\frac{23}{77}=\frac{53}{77}\approx0.7013$

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