Question

find the single discount as percent equivalent to successive discount of 20%,30%,40%​

Answer 1

Answer:

Let the marked price of an article be Rs. 100

Then first discount on it =Rs. 20

Price after discount =Rs. (100-20)=Rs. 80

Second discount on it =10% of Rs. 80

Rs.(80×

100

10

)=Rs.8

Price after second discount =Rs. (80-8)=Rs. 72

Net selling price =Rs. 72

Single discount equivalent to given successive discounts =(100-72)%=28%

Answer 2

Answer:

49.6%

Single equivalent discount for successive discounts of 10% and 20%.

= \left ( 10+20-\frac{20\times 10}{100} \right )\% = 28\%

Single equivalent discount for 28% and 30%.

= \left ( 28+30-\frac{28\times 30}{100} \right )\% = 49.6\%

Hence option [C] is correct answer.