Alyssa surveyed her classmates to make a prediction about kids her age. Using the table below, how many students watch tv between 1-2 hours?

Based on what i know about mean, this doesn't add up.

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?

If set d is not the empty set but is a subset of set e, then which of the following is true? d ∩ e = d d ∩ e = e d ∩ e = ∅