You roll a number cube. What are the odds that you will roll an even number?

Jun 15, 2016

$1 : 1$.

Explanation:

Probability = $\text{number of desirable outcomes"/"total number of possible outcomes}$

On a die, (number cube), there are 6 numbers, 3 of them are even
,
the probability of throwing an even number: $\frac{3}{6} = \frac{1}{2}$

Odds = $\text{number of desirable outcomes"/"number of non-desirable outcomes}$, often written as $a : b$ instead of $\frac{a}{b}$.

So the odds of rolling an even number are $3 : \left(6 - 3\right) = 1 : 1$.