Aptitude Hack#96(30-5-19)

Question:

Find the single discount equivalent to a series discount of 20 %, 10%, and 5%

   A )   Rs 68.40
   B )   Rs 66.40
   C )   Rs 65.40
   D )   Rs 58.40

Answer: A) Rs 68.40

Explanation: 
let the market price be Rs 100

then 
Net S.P=95% of 90% of 80% of Rs 100

=Rs(95/100*90/100*80/100*100)
=Rs68.40