Answer-The average weight of 63 notebooks kept in a box is 6.3 kg. When a new notebook is placed in the box...

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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

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)

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