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A dice has 6 sides numbered 1 to 6.

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

User Pichirichi
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1 Answer

5 votes

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.

User Mark Milford
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