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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Find a Single Discount (As a Percent) Equivalent to Following Successive Discounts: 20%, 10% and 5% - Mathematics

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प्रश्न

Find a single discount (as a percent) equivalent to following successive discounts:
20%, 10% and 5%

योग
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उत्तर

Successive discount = 20%, 10% and 5%

Let M.P. = ₹100

∴ S.P. after three discounts

∴ S.P.`=("M.P."(100-"Discount%"))/100`

`=₹(100(100-20)(100-10)(100-5))/(100xx100xx100)`

`=₹(100xx80xx90xx95)/(100xx100xx100)`

`=₹342/5`

∴ Total discount`=100-342/5`

`=(500-342)/5=158/5`

∴ Single discount`=158/5%`

= 31.6%

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अध्याय 8: Profit, Loss and Discount - Exercise 8 (D) [पृष्ठ ९८]

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सेलिना Concise Mathematics [English] Class 8 ICSE
अध्याय 8 Profit, Loss and Discount
Exercise 8 (D) | Q 15.3 | पृष्ठ ९८
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