Sainik School Entrance Exam 2020 Solved Paper

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Question : 21 of 150

Marks: +1, -0

Find the single discount equivalent to two successive discounts of

20 \%

and

10 \%

$25 \%$
$30 \%$
$28 \%$
$10 \%$

Solution:

(c) Two successive discount of

20 \%

and

10 \%

∴ 100 ×{80}/{100} ×{90}/{100}=100 ×{4}/{5} ×{9}/{10}

=2 ×4 ×9=72

A single discount

=100-72=28 \%

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