Im having trouble with a answer its about probability P(F) but I dont understand it that much

Step-by-step explanation:

This book doesn't really explain this specific probability question clearly. The circle has 10 small triangles. F is one triangle. We can say that F occurs every 10 small triangles so the ratio would be:

For the second one, we can have D or B, which both have 1 triangle each. We can say that D or B can have 2 triangles out of 10 so the ratio would be:

We can simplify 2/10 to 1/5.

For the third one, we have 3 vowels. So the ratio would be