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  1. In how many different ways can the letters of the word "TROUBLE" be arranged?
    2. A.

    840
    B.

    5040
    C.

    1260
    D.

    2520
    E.

    None of these

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    Answer : Option B

    Explanation :

    The word 'TROUBLE' consists of 7 distinct letters

    ∴ Required number of arrangements = 7!

    = 7*6*5*4*3*2*1 

    = 5040


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