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BCECE Engineering BCECE Engineering Solved Paper-2013

  • question_answer
    The number of six-digit numbers that can be formed from the digits 1, 2, 3, 4, 5, 6 and 7, so that digits do not repeat and the terminal digits are even is

    A)  144                

    B)         72                         

    C)  288                

    D)         720

    Correct Answer: D

    Solution :

    Terminal digits are the first and last digits. Since, terminal digits are even. \[\therefore \]1st place can be filled in 3 ways and last place can be filled in 2 ways and remaining places can be filled in \[{{\,}^{5}}{{P}_{4}}=120\]ways Hence, the number of six digit number, the terminal digits are even, is \[3\times 120\times 2=720.\]


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