Answer:
$10,880
Step-by-step explanation:
15% = 15 ÷ 100 = 0.15
So 15% of 12800 = 0.15 x 12800 = 1920
Therefore, 12800 - 1920 = 10880
OR
12800 x (1 - 0.15) = 10880
Okay so you can add up all the marbles to find a rate and divide.
Total: 20 marbles
Blue: 25% chance
Red: 40% chance
Green: 45% chance