Question
The average weight of 63 notebooks kept in a box is 6.3
kg. When a new notebook is placed in the box then the average is 6.4kg. Specify the weight of the new notebook. (In Kg)Solution
The average weight of the 63 notebooks is = 6.3 kg Sum of weight of the 63 notebooks = 6.3 x 63 = 396.9 kg The average weight of the 64 notebooks is = 6.4 kg Sum of weight of the 64 notebooks is = 6.4 x 64 = 409.6 kg Weight of the 64th book = 409.6-396.9 = 12.7 kg
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