MathDB

3

Part of 1998 Italy TST

Problems(1)

new license plates consist of 2 letters, 3 digits, and 2 letters

Source: Italy TST 1998 p3

2/16/2020
New license plates consist of two letters, three digits, and two letters (from the English alphabet of26 26 letters). What is the largest possible number of such license plates if it is required that every two of them differ at no less than two positions?
combinatorics