The sum of first n terms of two arithmetic progressions are in the ratio (2n + 4) ∶ (3n + 5). Find the ratio of their 15th terms.
1
31 ∶ 46
2
14 ∶ 29
3
17 ∶ 25
4
14 ∶ 17
The sum of first n terms of two arithmetic progressions are in the ratio (2n + 4) ∶ (3n + 5). Find the ratio of their 15th terms.