Step by step
The question
Question: A die is rolled and a coin is flipped.
How many outcomes are there?
1 Count the choices
2 Multiply
Each of the 6 die goes with 2 coin.
So we multiply: 6 × 2.
outcomes = 6 × 2
This is the counting principle: multiply the number of choices.
counting principle:
multiply the choices
6 groups of 2: that is 6 times 2.
2 + 2 + 2 + 2 + 2 + 2 = 6 × 2
Careful!
We do not add the choices.
Every choice goes with every other one, so we multiply.
Careful: not 6 + 2 = 8 ✗
6 times 2 is 12.
6 × 2 = 12
So there are 12 outcomes.
outcomes = 12
3 Check
Let's check: 12 divided by 6 is 2.
That gives back the 2 choices.
So the answer is right!
12 ÷ 6 = 2
Let's look back.
First: count the choices.
Then: multiply.
Last: check.
Answer
outcomes = 12