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15-02-2022
Mathematics

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How many different 3-digit PIN codes are there that only include the digits 7, 4, 3 and 2?

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15-02-2022

Answer:

64

Step-by-step explanation:

We can use the product rule of counting to answer this:

There are 4 possibilities for the 1st digit
There are 4 possibilities for the 2nd digit
There are 4 possibilities for the 3rd digit
So we use the product rule of counting to give us:

4×4×4=64

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