Abag contains 5 blue marbles, 2 black marbles, and 3 red marbles. a marble is randomly drawn from the bag. the probability of not drawing a black marble is . the probability of drawing a red marble is . nextreset

Probability of not drawing a black marble :
8/10 = 4/5

probability of drawing a red marble :
3/10

i hope this helps :)

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