Answer:
1/4
Step-by-step explanation:
There are 4 slot, he/she need 1 slot to win, so 1/4
16. The answer is 1. It means the total amount of the part of the work force.
16. The answer is 24%
To solve this problem you must apply the proccedure shown below:
If
, you have that:

Because
and 
Therefore, as you can see, the answer is: 
That would also be equal to -1