How many 4-digit numbers can be formed using only the digits 9, 8 and 7?

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asked Oct 4, 2021 76.9k views

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Igneus · Answer 1 · 2021-10-10T14:39:48+0000

Answer:

There are 81 numbers

Explanation:

Imagine that you have 4 boxes (one for each digit). In each box, you only have 3 choices for what digit you will do. You have to multiply all of the options (3*3*3*3) and you get 81.

How many 4-digit numbers can be formed using only the digits 9, 8 and 7?

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