Answers

2014-06-06T09:27:59+05:30
NUMBER have 6 different letters ,4 letters we can chose in 6c4 way
4 letters can be arranged 4! way 
no. of words = 4!*6c4
                  = (4!*6!)/(2!*4!)
                  =  360. 
0
2014-06-07T09:31:47+05:30
Word number has 6 letters in 4 places can be arranged in 6p4 ways=6!/6- 4!=6!/2=720/2=360
0