Question

*
The successive discount of 10% and 20% is
equivalent to a single discount of
(a) 29 %
(b) 85 %
(c) 68 %
(d) 28 %​

Answer 1

Answer:

Successive discount of x% and y% = \left ( x+y-\frac{x\times y}{100} \right )%

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

=>30-2=28%

Hence option [B] is the right answer