The table shows the average change in the water level of a reservoir for the last three years. A negative number is a decrease in water level.
What is the overall change in water level for
the last 3 years?

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.