The number of persons rose by 20% to 30,942 in a year. What was the population originally a year ago?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 25785.
Let the population a year ago be y
So,
y + 20% of y = 30942
⇒ y + 20/100 × y = 30942
⇒ y + y/5 = 30942
⇒ 6y/5 = 30942
⇒ y = (30942 × 5)/6
⇒ y = 25785
Thus, the population a year ago is 25785