CP = 100 / 6
SP = ( 100 / 6 ) X 1.2 = 100 / 5

Correct Option: C

You can go through options.
CP = 100 / 6 = 16.66 paisa
SP = 100 / 5 = 20 paisa

Profit (%) = [( 20 - 16.66 ) / 16.66 ] X 100
= [ 3.33 /16.66 ] X 100
= ( 1 / 5 ) X 100 = 20%
Hence, option (c) is correct.


Alternatively:
CP = 100 / 6
SP = ( 100 / 6 ) X 1.2 = 100 / 5

Hence, he should sell 5 toffees for Re. 1 (100 paisa)

Gain = 10% of 3,00,000 = 30000
Loss = 20% of 1,00,000 = 20000

Correct Option: D

Gain = 10% of 3,00,000 = 30000
Loss = 20% of 1,00,000 = 20000
Net gain = 10000 over Rs.4 lakh
Hence, profit = 10000/400000 x 100 = 2.5%

Let the original price be 100 Rs.
So reduced price = 100 X 0.95 X 0.90 X 0.80 = 68.40

Correct Option: C

Let the original price be 100 Rs.
So reduced price = 100 X 0.95 X 0.90 X 0.80 = 68.40

∴ Single discount = (100 — 68.4) % = 31.6%

Let the price be y , then
y x 0.8 x 0.9 = 468

Correct Option: D

Let the price be y , then
y x 0.8 x 0.9 = 468
∴ x=650, therefore marked price = Rs. 650


Alternatively : 650 X 0.8 X 0.2 = 468
Hence option (d) is correct

CP of A + B + c = 2xy + 5x*2y - 2x*4y = 20xy

Correct Option: B

CP of A + B + c = 2xy + 5x*2y - 2x*4y = 20xy

profit of A = 0.2xy
profit of B = 2xy
profit of C = 2xy
Total profit = 4.2xy

% profit = (4.2xy / 20xy) X 100 = 21%