Concept: The question tests on basics of Percentage (Profit/Loss)
Solution:
Let Price of the table = T and that of a chair = C
Price of table T = 350 + C ... (1)
Also 7T + 7C = 4550 or T + C = 650 ... (2)
Putting (1) in (2) 350 + 2C = 650
2C = 300 or C = 150
Therefore price of a table = 150 + 350 = 500
% Decrease = DifferenceLarger Number∗100=500−150500∗100=70DifferenceLarger Number∗100=500−150500∗100=70%
Option B