Which numbers are necessary to solve this problem? Franklin brought 4 jump ropes to the park. Each jump rope can be used by 3 people at a time. Fifteen friends came to the park to jump rope. How many friends could play jump rope if all of Franklin's ropes were being used? A. 4 jump ropes, 3 people B. 3 people, 15 friends C. 4 jump ropes, 15 friends D. 4 jump ropes, 3 people, 15 friends

Answer:   D. 4 jump ropes, 3 people, 15 friendsStep-by-step explanation:In order to answer the question how many friends could play, you need to be able to determine the smaller of ...(number of ropes) × (friends per rope)number of friendsYou can find the first of these numbers using the values of answer A, but if the number of Franklin's friends is smaller than 12, then you need to know that in order to properly answer the question. Hence, we believe you need to know ...the number of jump ropesthe number of friends per ropethe number of friends