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16. In a Grade 12 class of 40 at school, 8 got first-class passes, 22 got second-class passes and the rest failed in the half-yearly examination. Calculate the following (US9016 SOZ/ACI, SOZ/AC9) a) The ratio of passes to failures. b) The ratio of first-class passes to second-class passes. c) The ratio of second-class passes to failures. 17. Determine the ratio in which A, B, C and D share profits if A's share is three-fifths of C's share, B's share is five-sixths of C's share, and D's share is two-thirds of C's share (US9016 502/AC1, SO2/AC9) 18. A man works 5%% days per week and is paid by the day (Saturday is regarded as a half (1) day). If he was absent from work for two days, in what ratio is his weekly pay reduced? (US9016 SO2/AC1, SO2/AC9)