Angelina and her friends formed a club named the Extremely Cool Club. They wanted to assign a unique 4-digit secret code number

Question

3 years ago

11

Angelina and her friends formed a club named the Extremely Cool Club. They wanted to assign a unique 4-digit secret code number

to each member of the club. They decided to use the digits 1, 3, 7, and 9 for their numbering system and each of these digits can appear only once in every secret code number (i.e. 1379 is a valid number, but 1133 is not a valid number). What is the maximum number of members who could join the club if everyone is to be assigned a unique secret code number?

Mathematics

1 answer:

Marina CMI [18] · Answer 1 · 2021-12-14T13:05:02+03:00

Marina CMI [18]3 years ago

7 0

Answer:

16 is the max number of members