Answer:
18
Step-by-step explanation:
Sum the parts of the ratio, 3 + 4 = 7
Divide the amount of marbles by 7 to find the value of one part of the ratio
42 ÷ 7 = 6 ← value of 1 part of the ratio, thus
red marbles = 3 × 6 = 18
Answer:
18
Step-by-step explanation:
25 + 47 = 72
72 ÷ 4 = 18
I think it’s 38
If you divide 38 by 12 and 9 there’s 2 left