Concept explainers
For Exercises 1-7, choose the correct letter.
A website requires a 4-digit numerical password in which the digits cannot repeat. How many possible passwords are there?
A. 24 B. 5040 C. 151,200
D. 3,628,800
Determine the value of the given statement.
Answer to Problem 7STP
B
Explanation of Solution
Given:
Given statement is :
A website requires a 4-digit numerical password in which the digits cannot repeat . How many possible passwords are there.
Formula Used:
Calculation:
Since the digits does not repeat , so , we need to choose 4 digits from 10 digits (0,1,2,3,4,5,6,7,8,9) without replacement and the order of the digits in the 4-digit password does matter , so the possible number of passwords are =
So, the correct option is B.
Chapter 12 Solutions
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