Class size of the 3rd class interval is (a) 8 (b) 9 (c) 9.5 (d) 10 Upper limit of the 5th class interval is (a) 180 (b) 170.5 (c) 180.5 (d) 179.5 Class mark of the 6th class interval is (a) 184.5 (b) 185 (c) 185.5 (d) 186 How many students have their height more than 160 cm? (a) 19 (b) 18 (c) 27 (d) 28 How many students have their height less than or equal to 180 cm? (a) 22 (b) 19 (c) 29 (d) 31 49. 50 0
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