Question
The average weight of 7 boxes P, Q, R, S, T, U and V is 72kg. Another box A is added to group and the average now becomes 70kg. If another box C whose weight is 8 kg more than that of box A, replaces box P, then the average weight of Q, R, S, T, U, V, A and C becomes 69kg. Find the weight of box P?
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