A bag holds 6 green, 3 red, and 4 blue marbles. A marble is selected at random, what is the probability of not selecting a blue marble?

9/13

Step-by-step explanation:

6+3+4=13

13-4=9

it says the probability of NOT selecting a blue marble so it wouldnt be 4/13

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this