What should come in place of the question mark (?) in the following questions?

?% of 280 + 18% of 550 = 143.8 (a) 11 (b) 18 (c) 21 (d) 16 (e) None of these

Your Answer

x/100*280+18/100*550=143.8
=>14x/5+99=143.8
=>14x/5=44.8
=>14x=224
=>x=16

hence the answer is 16.
 

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