Acontractor is adding a back porch on to a house. the porch needs to hold 20 people and furniture that weighs 250 lbs. the contractor calculates that the porch needs to hold 3750 lb to meet that specification. what value did the contractor use for the weight of a person

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?