+0  
 
0
17
1
avatar

Deven has four ducks labeled A, B, C, and D. How many ways are there for Deven to arrange his ducks in a row if duck A must be before duck D, and duck D must be beofre duck B?

 Feb 11, 2021
 #1
avatar
0

Two

CADB   and   ADBC

 Feb 11, 2021

89 Online Users

avatar
avatar
avatar
avatar