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Marks obtained in first paper = 45/100 × 160 = 72 Marks to be obtained in both the papers (160+140) × 66/100 = 198 ∴ Marks to be obtained necessarily is second paper = 198 - 72 = 126 ∴ Percentage of marks to be obtained in second paper = 126/140 × 100 = 90%
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