Suppose there are three blue marbles and three yellow marbles in a bag and you want to remove two marbles. you do not replace the first marble. what is the probability that you will select a blue marble and then a yellow marble? express your answer as a percent

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

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?

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?