I need help understanding

Match the vocabulary to the proper definition. in probability, two events in which 1. conditional probability the outcome of one event is independent of the outcome of a second event. 2. dependent events in probability, two events in which the outcome of one event is dependent on the outcome of a second event. the probability of an event in which the outcome of the event is conditional on the outcome of one or more different events. 3. independent events

Y+ 2/y is it a polynomial in one variable or not? and if so, why?

What is the missing value in the proportion 4/5 = x/30