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3p → 72 1p → 72 ÷ 3 = 24 7p (remaining) → 72 x 7 = 168
3u → 168 + 15 = 183 1u → 183 ÷ 3 = 61 4u → 61 x 4 = 244
Question 11
Video explanation ↓A basket contained some marbles. Doris gave 1/4 of them and another 15 marbles to her brother. She then took out 4/7 of the remaining marbles for a game. There were 72 marbles left in the basket. How many marbles were there in the basket at first? (4 marks)
Answer: 244 marbles