A password consists of 4 distinct digits. How many different passwords can be created from the digits 0 - 9?
Options
A
5,040
B
4,000
C
3,024
D
210
Answer & Analysis
Answer
A
Analysis
Question Analysis
This question involves calculating the number of permutations of distinct objects.
The main focus is on using the permutation formula , where is the total number of objects and is the number of objects chosen at a time.
Key Concept Explanation
The permutation formula gives the number of ways to arrange objects out of distinct objects.
Step - by - Step Solution
Here, (since we have digits from 0 - 9) and .
Using the formula , we substitute and
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