SSC CGL 4 06 2019 Shift 1 Paper

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Question : 58 of 100

Marks: +1, -0

if decreasing 120 by x% gives the same result as increasing 40 by x%, then x% of 210 is what percent less than (x + 20)% of 180 ?

$33 1/3$
18
$16 2/3$
20

Solution:

120-\ {120 x}/{100}=40+\ {40 x}/{100}

80=\ {4 x}/{10}+\ {12 x}/{10}

800=16 x

x=50

ATQ,

50 \%

of 210

=105

70 \%

of 180

=126

=\ {126-105}/{126} \× 100

=\ {21}/{126} \×100=\ {50}{3}=16 \ {2}/{3} \%

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