Question

Give reason why the private sector cannot provide service at a reasonable cost.

Answer 1

Private sector cannot provide service at a reasonable cost because their main purpose is to earn profit.

Answer 2

If private sector will provide service at a reasonable cost than how will it be possible for them to earn profits? And as the main motive of private sector is to make profits so they will never provide service at a reasonable cost.
Service can be provided at a reasonable cost only by public sector as their motive is public welfare.