The marked price of a radio is 20% more than its cost price. If a discount of 10% is given on the marked price, the gain per cent is:
A. 15
B. 12
C. 10
D. 8
Answer: Option D
Solution (By Examveda Team)
Let CP = 100 Then, MP = 100 + 20% of 100 = 120 Now, SP = 120 - 10% of 120 = 108 Gain = 108 - 100 = 8 %Gain = $$\frac{{8 \times 100}}{{100}}$$ = 8% Short-cut 100(CP) == 20%(up) ⇒ 120(MP) == 10%(disc.) ⇒ 108 % gain = 8%This Question Belongs to Arithmetic Ability >> Profit And Loss
VERY GOOD EXPLANATION .
120*90/100 = 108
108-100 = 8%
let cp=100
sp=100+%P/100 of cp
=100+20/100*100=120
10%of 120 so,
90/100*120=108
p%=108-100/100=8%