RRB Group D 15-Oct-2018 Shift 1 Solved Paper

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Question : 84 of 84

Marks: +1, -0

A person bought some products at a rate of

\Rs. 80

for 20 pieces and sold them at a rate of

\Rs. 50

for 9 pieces. Calculate the person's gain or loss percentage.

$39.8 \%$ loss
$37.8 \%$ gain
$38.8 \%$ gain
$36.8 \%$ loss

Solution:

20 piece

=\Rs.80

and 9 piece

=\Rs. 50

by shortcut method,

{a}=20, {b}=80, {c}=9, {d}=50

Profit

={{ad}-{bc}}/{{bc}} \×100

Profit

={20 ×50-80 ×9}/{80 ×9} ×100 \%

Profit

={1000-720}/{720} ×100

Profit

={280}/{720} ×100 ⇒38.8 \%

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