Q. Successive discount of 10% and 20% are equivalent to a single discount of :
Answer: 28%
Notes: 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.

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