1 bar of chocolate costs Rs 80 but a box containing 6 bars of the same chocolate costs Rs 400. What is the effective discount (in %) on the box?
Cost of 1 chocolate = 80
Now cost of 6 chocolates = 80(6) = 480
Now Effective discount =Â $$\frac{400-480}{480}\times\ 100\ =16.67\%$$
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