SSC CGL 16 Aug 2015 Shift 1 Paper

Question : 137 of 200

Marks: +1, -0

Find a simple discount equivalent to a discount series of 10%, 20% and 25%.

Solution:

Single equivalent discount for discounts of 10% and 20%
=

(20+10-{20×10}/{100})

%
= (30 – 2)% = 28%
Single equivalent discounts for discounts of 28% and 25%
=

(8+25-{28×25}/{100})

%
= (53 –7)% = 46%

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