Q. A single discount equivalent to the successive discounts of 10%, 20% and 25% is:
Answer:
46%
Notes: Single of discount for successive discounts 10% and 20%
$ = \left ( 20+10-\frac{20\times 10}{100} \right )\% = 28\%$
∴ Equivalent discount for discounts 28% and 25%
$ = \left ( 28+25-\frac{28\times 25}{100} \right )\% = 53-7 = 46\%$
Hence option [A] is the right answer.