How many words with or without meaning, can be formed by using all the letters of the word, â€˜MOUSEâ€™, using each letter exactly once?  Choose the correct choice from the following answers:
A) 120	B) 140	C) 160	D) 720	E) 820
The word â€˜MOUSEâ€™ contains 5 different letters.   Therefore, Required number of words= Number of arrangement of 5 letters, taken all at a time   =5P5   = 5!   = 5*4*3*2*1= 
<gadget id="calculator">5*4*3*2*1</gadget>
<output>120</output>
120   120NSWER:120
<result>A</result>
How many words with or without meaning, can be formed by using all the letters of the word, â€˜MOUSEâ€™, using each letter exactly once?