SSC CHSL 5 Aug 2021 Shift 3 Paper

Section: Quantitative Aptitude

Question : 60 of 100

Marks: +1, -0

Two successive discounts each of

x \%

on the marked price of an article are equal to a single discount of

₹ 350

. If the marked price of the article is ₹ 800 , then the value of

x

Solution:

We know that

{MP} ×(\;{100-d_{1}}/{100}) ×(\;{100-d_{2}}/{100})= {SP}

800 × \;{(100-x)}/{100} × \;{(100-x)}/{100}

=800-350

⇒ \;\; (100-x)^{2}=\;{4500000}/{800}=5625

⇒ \;\; (100-x)=√{5625}=75

⇒ \;\; x=100-75=25 \%

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