How many words of 3 letters with or without meaning be made from the letters of the word ‘WONDER’ when repetition of letters is not allowed?
150
120
240
360
The word WONDER has 6 letters.
We have 3 places where letters are to be placed.
For the first letter, there are 6 choices.
since repetition is not allowed, the second, and third letters have 5 and 4 choices.
So the total number of ways is
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