Awebsite requires a four-digit numerical password in which the digits cannot repeat. how many possible passwords are there? . a) 24. b) 5,040. c) 151,200. d) 3,628,801

b) 5040

Step-by-step explanation:

Given: A website requires a four-digit numerical password in which the digits cannot repeat.

Total number of digits (0,1,2,3,4,5,6,7,8,9)=10

By permutation , the number of possible passwords is given by :-

Hence, the  number of possible passwords formed = 5040.

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632