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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: 10%, 20% and 20%

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प्रश्न

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

योग
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उत्तर

Successive discount = 10%, 20% and 20%

Let M.P. = ₹100

∴ S.P. after 3 discounts

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

`=(100xx(100-10)(100-20)(100-20))/(100xx100xx100)`

`=(100xx90xx80xx80)/(100xx100xx100)=576/10`

∴ Total discount =`₹100-576/10`

`=₹(1000-576)/10=424/10`

∴ Single discount`=424/10%`

= 42.4%

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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 15.2 | पृष्ठ ९८

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