Mathematics, 01.09.2021 16:40, tonimgreen17p6vqjq

The mean length of 7 planks of wood is 1.35m. When an extra plank of wood is added, the mean length of a plank of wood increase to 1.4m. the length of the extra plank of wood that was added is Select one a. 2. 4 b. 1 C. 1.25 d. 1.75V

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The mean length of 7 planks of wood is 1.35m. When an extra plank of wood is added, the mean length...