Answer:
50/50
a business that has an advertisement can be successful and a business that doesn't have advertisement will be half successful and half not
why half?
If you're the business man/woman and you have enough money to purchase all the needs in your business without worrying about the money, it will be successful why? because you're hardworking, you used a money for your business to help it to be successful. You have enough money to purchase what will be the needs for your business WITHOUT advertising. And it will be successful if you have FRIENDS that will help you to give a feedback to your product for the customers to take a risk to use yours
It's not going to be successful if you haven't enough money to purchase all the needs of your business.
