Multiple choice

The marked price of a mixer is Rs.1600. The shopkeeper gives successive discount of 10% and x% to the customer. If the customer pays Rs.1224 for the mixer, find the value of x

  1. 8%

  2. 10%

  3. 12%

  4. 15%
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Marked price=Rs.1600. First discount 10%: price becomes 1600×0.9=Rs.1440. After second discount of x%, final price=1224. So 1440×(1-x/100)=1224, giving 1-x/100=1224/1440=0.85, so x/100=0.15, x=15%. Tests successive discount calculation and algebraic manipulation.

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