Check the picture below.
now, since we know what "f" is, let us use the CNT triangle with the small COR one.

That means she need to buy 2 packs of 100.
What data? - I would say that his "data" showed that each prize has a likelihood of 1/4 to be won
Ratio: 30:18
If you were asking for the ratio-
Compare: 30 minutes is 12 more minutes than 18
If you were asking which one is grater-
Answer:
=9 * 1000 / 3600
=9000 / 3600
=2.5m/s
note that 1000m makes 1km and 3600seconds make an hour
Step-by-step explanation: