Emmanu Counting principle involving a specified arrangement A troupe of 9 dancers is going to line up on stage. Of these dancers, 5 are wearing black and 4 are wearing red. A dancer wearing black must be in the first position and they must alternate between colors. In how many ways can the dancers line up? Explanation Check O 2020 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy | Acce PType here to search 11