Successive discount of 10% and 20% are equivalent to a single discount of :
Successive discount of 10% and 20% are equivalent to a single discount of :
[A]12%
[B]28%
[C]30%
[D]15%
28%
Successive discount of x% and y% = $latex \left ( x+y-\frac{x\times y}{100} \right )&s=1$%
∴ Required discount = $latex \left ( 20+10-\frac{20\times 10}{100} \right )&s=1$%
$latex =>30-2=28$%
Hence option [B] is the right answer.