Abag contain 5blue balls ,4 red balls, and 3 orange balls. if a ball is picked from the bag at random, what is the probability that it is a blue ball? answers have been rounded to the tenth place

(40 points) i need some . an answer definition is appreciated as well.

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

Ming says that 0.24 > 1/4 because 0.24= 2/4. which best explains mings error