What is the probability of getting a license plate that has a repeated letter or digit if you live in a state in which license plates have one numeral followed by three letters followed by three numerals? (Round your answer to one decimal place.)

Answer 1

Probability of not repeating, P(no repeat)
=10*26*25*24*9*8*7 / (10^4 * 26^4)

Probability repeated
=1-P(no repeat)