Discussion Forum : True Discount
Question - A single discount equivalent to the successive discounts of 10%, 20% and 25% is
Options:
A .  60%
B .  46%
C .  55%
D .  45%
Answer: Option B
Answer: (b)Single of discount for successive discounts 10% and 20%= $(20 + 10 - {20 × 10}/100)$% = 28%Equivalent discount for discounts 28% and 25%= $(28 + 25 - {28 × 25}/100)$%= 53 - 7 = 46% Using Rule 4,If $D_1, D_2, D_3$ are successive discounts, then equivalent discount/overall discount is (in percentage)100 - $[({100 - D_1}/100)({100 - D_2}/100)({100 - D_3}/100) × 100]$

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