Question

A dice has 6 sides numbered 1 to 6.

What is the odds against rolling a 2 or a 4.

Answer 1

Answer is 2:1

Step-by-step explanation:

Here are the possible outcomes: {1,2,3,4,5,6}

We want a 2 or a 4 to happen, so the complement or opposite of those would be {1,3,5,6}

There are 4 things we don't want to happen {1,3,5,6} and 2 things we do want to happen {2,4}

The odds against rolling a 2 or 4 is 4:2 and that simplifies to 2:1

This is read out as "2 to 1". Meaning the stuff we don't want to happen will happen twice as likely compared to the outcomes we want to see.