जॉइन Examsbookउत्तर : 3. "decrease by 4%"
A number is increased by 20% and then decreased by 20%, the final value of the number is ?5
प्र: A number is increased by 20% and then decreased by 20%, the final value of the number is ?
- 1increase by 2%false
- 2decrease by 3%false
- 3decrease by 4%true
- 4increase by 5%false
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उत्तर : 3. "decrease by 4%"
व्याख्या :
Answer: C) decrease by 4% Explanation: Here, x = 20 and y = - 20Therefore, the net % change in value=x + y + xy100 %= 20 + -20 + 20 × -20100% or - 4% Since the sign is negative, there is a decrease in value by 4%.