SSC CHSL 19 Mar 2020 Shift 1 Paper

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Question : 56 of 100

Marks: +1, -0

The marked price of a book is

₹ 900

. What is the selling price of the book after giving two successive discounts each of

10 \%

on it?

₹ 800
₹ 749
₹ 729
₹ 820

Solution:

Given,

r_{1}=r_{2}=10 \%

Equivalent discount

=r_{1}+r_{2}-{r_{1} \×r_{2}}/{100}

=10+10-{10 ×10}/{100}

=20-1=19 \%

Given, marked price

=₹ 900

∴ Selling price

={{ \Marked \price }}/{(1-{{ \Discount\% }}/{100})}

={900}/{100} \×(100-19)

=₹ 729

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