A car salesman sold a total of 18 cars and trucks in a month he makes $75 commission for each car he sells and $125 commission for each truck he sells if he made 1,700 commission how many cars and trucks did he sell

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?