Question

A secret code must consist of three capital letters followed by a digit. Letters cannot be repeated. How many secret codes are possible?


A.
140,400


B.
156,000


C.
175,760


D.
358,800

Answer 1

Assuming the code uses English alphabet,
Choices for first letter: 26
Choices for second letter: 26
Choices for third letter: 26
Choices for digit: 10
Total number of codes = product of all 4 choices.