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7th Class Mathematics Related to Competitive Exam Question Bank Mathematical Operations

  • question_answer
    DIRECTIONS: In the following question, the symbols, ©, ©, =, * and * are used with the following meanings 'A © B' means 'A is greater than B'; 'A © B' means 'A is greater than or equal to B'; 'A = B' means 'A is equal to B'; 'A * B' means 'A is smaller than B', 'A * B' means 'A is either smaller than or equal to B'; Now in each of the following questions, assuming the given statements to be true, find which of the two conclusions I and II given below them is/are definitely true. Statements: S © T, M * K, T = K Conclusions:             I. T © M II. T = M

    A) if only if conclusion I is true;

    B) if only conclusion II is true;

    C) if either I or II is true;

    D) if neither I nor II is true.

    Correct Answer: C

    Solution :

        Given statements:\[S>T,\,\,M\le K,\,\,T=K\] Relation between\[T\]and\[M\] \[T=K,\]\[K\ge M\Rightarrow T\ge M\Rightarrow T>M\]or\[T=M\] \[\Rightarrow T\,\,M\]or\[T=M\] So, either I or II is true.


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