SSC CGL 2010 Tier 1 Question Paper - Shift 2

Question 136

Successive discounts of 10%, 20% and 30% is equivalent to a single discount of:

Solution

We can assume that discount is on a price of 100 
so after first discount of 10% its value will be = 90
now after second consecutive discount of 20% its value will be $$90(1-\frac{20}{100})$$=72
and after third consecutive discount of 30% its value will be $$72(1-\frac{30}{100})$$=50.4
hence it is a equivalent to a single discount of 100-50.4=49.6

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