The probability that it is monday and that a student is absent is 3/100. because there are five school days in a week the probability that a randomly selected day of the school week is monday is 1/5. what is the probability that a student is absent given that today is monday?

, i don't think my teacher will accept the answer "today is not monday"

I'm thinking that this is a simple fraction multiplication problem, but I tend to skip over things so I might not be right (sorry) 3/500 because 3/100 absent rate would mean that the student is absent 3 days out of 100, so if there is only 1 day out of five that they can be absent (because today is the only day we are talking about) it would give them a less probability of being absent. Sorry if the explanation above doesn't make any sense :P I think its 3/500