Manuel is choosing a 3 -letter password from the letters A, B, C, D, and E. The password cannot have the same letter repeated in it. How many such passwords are possible?

Respuesta :

RYZR
Here they are... ABC ABD ABE ACB ACD ACE ADB ADC ADE.. Just do the same thing with the others... Ex. BCD BDE BCE BCA BDA BDC BDE etc.