permutations
given nine elements A,B,C,D,E,F,G,H,I.How many ways we can arrange them such that it must follow order 1)A-C-D-E,2) E-H-I (Meaning of 2) is h should not come before e and i should not come before e,h)
given nine elements A,B,C,D,E,F,G,H,I.How many ways we can arrange them such that it must follow order 1)A-C-D-E,2) E-H-I (Meaning of 2) is h should not come before e an...