Aproblem on a geometry quiz says to "sketch a scalene triangle." the solution shown is marked wrong. why?

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.

What percent of 18 is 24? and plz explain thx.

What is the mean of the data set 125, 141, 213, 155, 281