A code is to be made by arranging 6 letters. Three of the letters used will be the letter A, two of the letters used will be the letter B and one of the letters used will be the letter C . If there is only one way to present each letter, how many different codes are possible?	Select.
A) 230 B) 360 C) 420 D) 840 E) 5,040
we have 6 letters out of which 3 are of one kind, 2 are of another kind..   so total ways = 6!/2!1!=360   ans 360
<result>B</result>
A code is to be made by arranging 6 letters. Three of the letters used will be the letter A, two of the letters used will be the letter B and one of the letters used will be the letter C . If there is only one way to present each letter, how many different codes are possible?