# In a single roll of a six-sided dice, what is the probability of rolling a three or an even number?

##### 2 Answers

#### Explanation:

You have 2 events: A & B.

Probability of rolling a three

Probability of rolling an even number

#### Explanation:

We have two events A and B:

**A** being an even number 2 4 6.

**B** being a 3.

Since this is an A **or** B event occurring, we have a union of events. i.e.

So we have:

We could have obtained this result directly by considering the 2 events as one event:

An even number and 3 is four favourable outcomes, so: