Question

A dealer of scientific instruments allows 20% discounts on the marked price of the instrument and still makes a profit of 25%. If his gain over the sale of an instrument is Rs150, find the marked price of the instrument.

Answer 1

Let the M.P of the instrument be x.
Now the price of the instrument after 20% discount is x-20%x=>4x/5....
He makes a profit of 25% on this discounted price which is equal to rs 150 per piece..
4x/5×25%=150
X=Rs 750.... The marked price

Answer 2

"$\large \green{ \fcolorbox{gray}{black}{ ☑ \: \textbf{Verified \: answer}}}$

GIVEN

• Let C.P of instrument = Rs.100
• Profit = 25% of Rs.100=Rs.25

SOLUTION

If profit is Rs.25,

• C.P = Rs.100

If profit is Rs.150, C.P

• =Rs.100/25×150
• =Rs.600

S.P of the instrument

• = Rs.600+Rs.150
• = Rs.750

Let M.P of the instrument be Rs. 100

If S.P is Rs.80,

• MP = Rs.100/80×750
• MP = Rs.937.50

★ Thus, marked price of the instrument =Rs.937.50