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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

(d)16 STEP 1: x/100 * 280 + 18/100 * 550 = 143.8 STEP 2: x/5 * 14 + 99 = 143.8 STEP 3: (14x + 495)/5 = 143.8 STEP 4: 14x + 495 = 719 STEP 5:14x = 719 - 495 STEP 6: 14x = 224 STEP 7: x = 224/14 STEP 8: x = 16 👍

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