Astudent has a bag of marbles. there are 75 blue marbles, 50 green marbles, 100 orange marbles, and 25 red marbles. they select a marble, record its color and return it to the bag. they do this 3 times. what is the probability of them selecting a red marble, then a green marble, and then a blue or orange marble?

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?