Here on this problem. We've been given a list, a list of given values we won't identify if it is a street random, variable, continuous, random variable. We're not a random variable it all now on A. We have grades of A, B, C, D, E and F. Now, because there are accountable number of values that it can take on that tells us that this has to be discreet. A discreet, random variable is whenever it can take on accountable number of values and then a continuous random variable, because whenever it could take on an infinite number of value, right on B, we have the heights of students. Well, your students height, even if they're pretty close, will never be exactly the same. And so because that can vary infinitely, that is what is called a continuous random variable. And so be is a continuous random verb. C says the numbers of students in statistics classes well, this is still going to be accountable. The number of students and you'll never have a fractional number of students, and so you'll go from 20 to 21 students. And so because they're not an infinite and uncountable number of students. This means this is discreet on DE. We have eye colors of statistics students. Hi colors. Now the number of students with a certain eye color would be a random variable. But just the eye colors themselves is not a random verbal, not on the the number of Times statistic. Students must toss a point before getting heads again. That is accountable number, and so it means that is discreet.