Reference no: EM132186118
True or False for the following:
a) The number of permutations of five letters A,B,C,D, and E with A comes before C, and C comes before E is 20.
b) The number of permutations of six letters A, B, C, D, E and F that contains "BAD" is 24.
c) The number of permutations of six letters A, B, C, D, E and F with A comes before B and C comes before D is 180.
d) A, B, C, D , E and F sit at a round table. The chance that A and B sit next to each other is 40%.