Question 1155407
Find the number of distinguishable permutations of the letters in the word 

“Missouri"

Letter	Frequency
{{{M}}}	{{{1}}}
{{{I}}}	{{{2}}}
{{{S}}}	{{{2}}}
{{{U}}}	{{{1}}}
{{{R}}}  {{{1}}}
{{{O}}}  {{{1}}}

Total	{{{8}}}

The value, calculated by hand is: {{{8!/(1!*2!*2!*1!*1!*1!) =8!/(2!*2!)=(8*7*6*5*4*3*2*1)/(2*1*2*1)=40320/4=10080}}}