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    Question

    Simplify 21 βˆ’ [6 + 7 βˆ’ {3.22 βˆ’ (1.1 Γ—

    0.2)}].
    A 13 Correct Answer Incorrect Answer
    B 12 Correct Answer Incorrect Answer
    C 11 Correct Answer Incorrect Answer
    D 10 Correct Answer Incorrect Answer

    Solution

    21 βˆ’ [6 + 7 βˆ’ {3.22 βˆ’(1.1 Γ— 0.2)}]Β  = 21 βˆ’ [6 + 7 βˆ’ {3.22 βˆ’ 0.22}] = 21 βˆ’ [6 + 7 βˆ’3.00] = 21 βˆ’ [13 βˆ’ 3] = 21 βˆ’ 10 = 11

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