Final answer:
The ratio of red to purple marbles in a bag containing 5 red and 8 purple marbles is 5:8.
Step-by-step explanation:
The question asks about the ratio of red to purple marbles in a bag that contains 5 red marbles, 7 blue marbles, and 8 purple marbles. A ratio is a way to compare the sizes of two or more quantities. To find the ratio of red marbles to purple marbles, we simply compare the number of red marbles to the number of purple marbles.
The number of red marbles is 5, and the number of purple marbles is 8. Therefore, the ratio of red to purple marbles is 5:8. This ratio means that for every 5 red marbles, there are 8 purple marbles. Ratios can be used to represent probabilities as well, such as the probability of drawing a marble of a certain color from a bag.