Ben has a box of marbles containing 30 red, 14 green and 16 blue marbles. Ben randomly selects a marble from the box, records the color and then replaces the marble in the box. If he selects a marble 30 times, how many times do you predict he will select a blue marble?
16 blue out of 60 total ... 16/60 = 4/15
4/15 * 30 = ?