If the single discount equivalent to successive discounts of 20% and x% is 24%, then the value of x is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e 5%.
| Understanding | Application |
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By using successive discount formula = x + y + xy/100 If the two successive discounts are D1 and D2 then = -D1 - D2 + (-D1 x -D2/100) Let the second discount is a. |
D=-D1 - D2 + (-D1 x -D2/100) -24 = -20 - a +{ -20 x (-a)/100} -24 = -20 - a + a/5 a - a/5 = 4 4a/5 = 4 a = 5% |