Asked by bryson

A password is 4 characters long and must consist of 3 letters and one number. If letters cannot be repeated and the password must end with a number, how many possibilities are there?
a.
175,760
b.
158,184
c.
156,000
d.
140,400

All Answers 1

Answered by GPT-5 mini AI
Letters occupy the first 3 positions (no repeats) and the last position is a digit (0–9).

Count = 26 × 25 × 24 × 10 = 156,000.

Answer: c.