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Students passed in English = 2400 × 28% = 672 Students passed in Economics = 2400 × 14% = 336 After increasing 42 students= 336 + 42 = 378 Required ratio = 672:378 = 16:9
18, 30, 54, 90, 138, ?
8 27 64 125 ? 343
...110, 156, 212, ?, 354, 440
362 452 550 656 770 892 ?
...32 48 96 ? 720 2520
221, 100, 0, -81, ?
...289 169 121 ? 25 9
...9, 20, 63, ?, 1285, 7716
144, 288, 96, 384, 76.8, ?