In a bag containing red, green, and pink tokens, the ratio of red to green tokens was 7 : 20, while the ratio of pink to red tokens was 15 : 12. What was the ratio of green to pink tokens?​

Correct option is C

Given:

Red : Green = 7:20

Pink : Red = 15:12

Solution:
From Red : Green = 7:20

G : R = 20 : 7.
From Pink : Red = 15:12

R : P = 12 : 15.
​$$\frac{G}{P}=\frac{G}{R}\times\frac{R}{P}=\frac{20}{7}\times\frac{12}{15}=\frac{240}{105}=\frac{16}{7}.$$​​
Therefore, Green : Pink = 16 : 7.