Question:
Given 5 digits 0, 1, 2, 3, 4. How many different 5-digit numbers are made up of these 5 digits?
Reference explanation:
Correct Answer: GET
Call the number to look up in the form \(\overline {abcde} \), then
+) There are 4 ways to choose the digit a (except the digit 0).
+) There are 4 ways to choose the digit b.
+) There are 3 ways to choose the digit c.
+) There are 2 ways to choose the digit d.
+) There is one way to choose the digit e.
So there are all 4.4.3.2.1 = 96 numbers to find.
ADSENSE
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