An internet service provider in a town has 500 subscribers and charging Rs. 300 per month from each subscriber. He proposes to increase the monthly charges and it is believed from past experience that for every increase of Rs. 1, one subscriber will discontinue the service.
If Rs. x is the monthly increase in subscription amount, then the number of subscribers is:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 500 − x
For every increase of Rs. 1, one subscriber leaves. So an increase of Rs. x makes x of the 500 subscribers leave:
\(\text{number of subscribers} = 500 - x\)