Equation of a line pass through origin in called

The random variable x is defined as the number marking the sector in which the arrow lands when the spinner in the diagram is spun once.

Asa a yogurt shop allows its customers to add, for no charge, 3 toppings to any yogurt purchased. if the store has 18 possible toppings, how many different 3-topping combinations can a customers choose?

35 is what percent of 700? show your work