Kaylen C.

asked • 09/27/21

In this version, you are to form a 5-digit number from the digits 1, 2, 4, 6, 7, 8, and 9, using each at most once.

How many different 5-digit numbers can be formed?

How many of these are less than 50000?

1 Expert Answer

By:

Kaylen C.

Okay thank you! I understand that completely. What about the second question? I am still having trouble figuring out how to answer it.
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09/27/21

Matt C.

tutor
Hi, I am glad the answer was helpful. I did not see the second part before. For the number to be less than 50000, the first digit must be either 1, 2, or 4. So there are only 3 options for the leftmost digit. But still 6 for the second, 5 for the third, 4 for the fourth, and 3 for the fifth. So the total is 3 * 6 * 5 * 4 * 3 = 1080.
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09/27/21

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