Respuesta :
The total number of marbles is 30+20+50= 100, so. Since there are 20 red marbles and 50 blue marbles. There are 30+50=80. 80/100=4/5= 80%
Answer:
30%
Step-by-step explanation:
30+50+20=100, and since there's 30 red marbles, you have a 30% chance of picking a red out of the 100 marbles.