Question

find a single discount equivalent to two successive discount of 20%and 10%

Answer 1

if the amount is 100 then successive discounts of 20% = Rs 80 and then 10% = Rs 72
we find that what % of 100 = Rs 72let the % be x
then 100- 100×x%= 72
100 -x =72 x = 36
so a single discount of 36% is equivalent to two successive discount of 20% and 10%


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