The table show 1 2 3 4 5s prices and numbers of commodities bought.
Number of commodities (Q) 1 2 3 4 5
Prices (N) 5 10 X 20 Y
Determine X + Y.
Number of commodities (Q) 1 2 3 4 5
Prices (N) 5 10 X 20 Y
Determine X + Y.