Question
John is choosing a password for his access to the internet. He decided not to use the digit 0 or the
letter M. Each letter or number may be used more than once. How many passwords of 2 letters followed
by 4 digits are possible?
A.3,100,625
B.3,100,500
C.4,100,625
D.4,200,625
letter M. Each letter or number may be used more than once. How many passwords of 2 letters followed
by 4 digits are possible?
A.3,100,625
B.3,100,500
C.4,100,625
D.4,200,625
Answers
Damon
25 letters allowed for first spot
25 for second spot
so
625 letter combinations
9 digits
9*9*9*9 = 9^4
so
625*9^4 = 4,100,625
25 for second spot
so
625 letter combinations
9 digits
9*9*9*9 = 9^4
so
625*9^4 = 4,100,625