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10 May, 20:00

How many permutations can be made of the letters of the word "radar" when taken all at a time?

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  1. 10 May, 20:47
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    Slot method

    5 letters

    1st slot=5 options

    2nd slot=4 options (1 went ot first slot)

    3rd slot=3 options (1 went to 2nd)

    4th slot=2 options

    5th slot=1 option

    5*4*3*2*1=120 ways
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