its just the chance of drawing a blue marble. the drawing of the red marble was independent to the current drawing of the blue marble, so the probability of drawing a blue marble is just the number of blue marbles over the total number of marbles. that is 10/16 or 5/8
12x > 18x - 27 - 15 12x > 18x - 42 12x - 18x > -42 -6x > -42 x < -42/-6 two negatives make a positive so now its x < 42/6 Lastly divide 42/6 so it can equal 7
