Posted by Minatsu on .
Abelardo wants to create several different 7character screen names. He wants to use arrangements of the first 3 letters of his first name(abe, followed by arrangements of 4 digits in 1984, the year of his birth. How many different screen names can he create in this way?
A.72
B.144
C.288
D.576

Math 
Shelby,
1752