Multiple choice general knowledge math & puzzles

The price x of a t-shirt was first reduced by 10%. Then the new price was reduced by a further 20%. The price of the T-shirt after the two reductions is given by

  1. x - 0.3x

  2. x - 30

  3. x - 0.3x + 0.02x

  4. x + 0.02x

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

After the first 10% reduction, the price becomes 0.9x. The subsequent 20% reduction applies to this new price: 0.8 × 0.9x = 0.72x. Option C simplifies to x - 0.3x + 0.02x = 0.72x, which correctly accounts for the compound discount.