DSSSB · Mathematics

The production of an instrument in a factory increases by 30% in the first year. In the second year, it decreases by 15%, and in the third year, it increases again by 20%. What is the overall percentage change in production after three years?

  1. +33.8%
  2. -32.6%
  3. -33.8%
  4. +32.6%
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