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Spinner

100

If I spin a wheel with ten segments numbered 1-10 what is the chance of me landing on a 3 as a fraction.

1/10

200

I spin a wheel with 20 segments and 10 segments are striped what is the chance of me landing on a non-striped segment? 

10/20 

or

0.5

500

If I spin my poker game and ther 20 segments but fourth space is black what is the chance of me landing on a black space?

4/20