Answer:
30 Oranges
Explanation:
The ratio of apples to oranges is 4:3. For every 4 apples there are 3 organges. We can write that as 4A/3O, where A and O are Apples and Oranges. This can be rewritten as percentages of each fruit. A bag of 7 would have 4 Apples (4/7) or 0.5715 [57.15%] and 3 Oranges (3/7) or 0.4285 [42.85%].
A bag of 70(A and O) can be determined to have:
Apples: 70*(0.5715) = 40 Apples, and
Oranges: 70*(0.4285) = 30 Oranges