Abag contains 9 marbles 3 are green 4 are red and 2 are blue. bob chooses a marble at random and without putting it back chooses one at random. what is the probability that the first marble is blue and the second is green?

5/9

Step-by-step explanation:

a bag contains 9 marbles

3green 4red & 2blue

probability of picking a blue and green marble is 2+3 =5

so therefore the probability of picking a blue and green marble is 5/9

step-by-step explanation:

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15