there are 15 blue marbles, 8 green marbles, and 7 red marbles in a bag. hanna randomly draws a marble from the bag. what is the probability that hanna draws a blue marble

I'm not sure exactly but my best guess would be 1/4

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post

B12/23 is your answer