Question

a single discount equivalent toa discount series of 30%,20%&10%​

Answer 1

Let, the Price be 100

According to the question :

$100 \times \frac{100 - 30}{100} \times \frac{100 - 20}{100} \times \frac{100 - 10}{100} \\ \\ = > 100 \times \frac{70}{100} \times \frac{80}{100} \times \frac{90}{100} \\ \\ = > 50.4$

Now, 100 - 50.4 = 46.6

So, the equivalent discount will be 46.6%

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Answer 2

Answer:

10 ----------- 7

10 ---------- 8

10 ---------- 9

1000 ---------- 504

D = 496

D% = 49.6 % (Ans.)

( और भी method है , जैसे A+B+AB/100 Wala )

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