Answers

2016-01-14T19:21:06+05:30
P(n;m1,m2,m3......mk)
=n!/m1!m2!....,mk!
here there are 7 letters of which is H=1,E=1,X=1,A=1,G=1,O=1,N=1
required number of permutation is
7!/1!1!1!1!1!1!
=1*2*3*4*5*6*7/1*1*1*1*1*1*1
=1*2*3*4*5*6*7
=5040.
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