Riddle

"if it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets? "

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

What are the values of each variable in the diagram below?

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct