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Question

The value of −8−2[6+4{7−(2.8+1.4)}] is equal to

A
34.4
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B
42.4
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C
+42.4
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D
+34.4
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Solution

The correct option is B 42.4
82[6+4{7(4.2)}]
=82[6+4{74.2}]
=82[6+4{2.8}]
=82[6+11.2]=82[17.2]
=834.4=42.4

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