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  3. CET Karnataka Engineering

CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2004

  • question_answer
    In the group ( 1, 2, 3, 4, 5, 6) under multiplication modulo \[7,{{2}^{-1}}\times 4\] is equal to :

    A)  1                                            

    B)  4

    C)  2                                            

    D)  3

    Correct Answer: C

    Solution :

    Given that the group \[\left( 1,\text{ }2,\text{ }3,\text{ }4,\text{ }5,\text{ }6 \right)\] \[\therefore \]  \[{{2}^{-1}}\times {{\,}_{7}}4=\frac{1}{2}\times {{\,}_{7}}4=2\]


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