Question

7. If the cost price of 15 clocks is equal to the selling prince of 20 clocks , find the loss or gain percent

Answer 1

Step-by-step explanation:

selling price of clock be x

cost price of 15 clocks =20x

selling price of 15 clocks =15x

loss=20x-15x=5x

loss%=5x/20x *100

=25%

Answer 2

Answer:

Step-by-step explanation:

Let the C. P be x and the S .P be y

then 15 x = 20 y

As from

$x>y =>c.p> s.p$

hence, loss

=>$loss =\frac{c.p - s.p}{c.p} \:x \:100 \:\frac{x-y}{x} \:x \:100$

=>$( 1- \frac{y}{x} ) 100= (1-\frac{15}{20} )\\100...(from(1))\\=25 \:percentage\: loss$