If average of 9 boxes is 18 and average of 8 boxes is 14 what is the weight of 9th box
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Solution:
If average of 9 boxes is 18 and average of 8 boxes is 14, so, we let
x be the weight of 9th box, then
(9*18)-(8*14)=x
162-112=x
50=x
x=50.
Therefore, the weight of 9th box is 50.
If average of 9 boxes is 18 and average of 8 boxes is 14, so, we let
x be the weight of 9th box, then
(9*18)-(8*14)=x
162-112=x
50=x
x=50.
Therefore, the weight of 9th box is 50.
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