3 years ago

How many 4-digit numbers can you write if you can use only digits 1 and 2?

Mathematics

1 answer:

Lapatulllka [165]3 years ago

3 0

Answer:

Step-by-step explanation:

Thus if you are not allowed to repeat a digit the number of possible 4 digit numbers you can construct from 1,2,3,4 is 4 3 2 1 = 24.

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