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By Mathematics Mcqs Simplification and Approximation No Comments

20% of 40 + ? % of 80 = 120

A. 140
B. 120
C. 160
D. 180

Explanation:

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20% of 40 + ? % of 80 = 120

=> 800/100 + ?/100 * 80 = 120
=> ? = 140

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