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Standard VIII

Mathematics

Finding Discounts

If there is a...

Question

If there is a discount of $30 %$ on a speaker and Mira gets another discount of $20 %$ through her coupon, calculate the price paid by her to buy the speaker, if the original price is $$ 100$ .

86.00$

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77.60$

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56.00$

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50.00$

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44.00$

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Solution

The correct option is C 56.00 $T h e r e i s a i n i t i a l 30$ \ $100$ speaker. This reduces its cost to $$ 70$ .
Now there is another $20 %$ discount on it.
Hence, its final price will be $(1 - \frac{20}{100}) \times 70$
$= (1 - \frac{1}{5}) \times 70$
$= \frac{4}{5} \times 70 =$ 56$

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If there is a discount of 30% on a speaker and Mira gets another discount of 20% through her coupon, calculate the price paid by her to buy the speaker, if the original price is $100.

The correct option is C 56.00Thereisainitial30\100 speaker. This reduces its cost to $70. Now there is another 20% discount on it. Hence, its final price will be (1−20100)×70=(1−15)×70=45×70= 56$

If there is a discount of $30 %$ on a speaker and Mira gets another discount of $20 %$ through her coupon, calculate the price paid by her to buy the speaker, if the original price is $$ 100$ .

The correct option is C 56.00 $T h e r e i s a i n i t i a l 30$ \ $100$ speaker. This reduces its cost to $$ 70$ .
Now there is another $20 %$ discount on it.
Hence, its final price will be $(1 - \frac{20}{100}) \times 70$
$= (1 - \frac{1}{5}) \times 70$
$= \frac{4}{5} \times 70 =$ 56$