The average weight of 69 notebooks kept in a box is 6.9 kg. Keep 1 not – McqOptions

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1.	The average weight of 69 notebooks kept in a box is 6.9 kg. Keep 1 notebook in the box and its average weight goes up to 7 kg. Find the weight of new notebook? (in kg)
A.	13.1
B.	13.6
C.	13.9
D.	13.4
Answer» D. 13.4

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