Hi.
This is how you set this up :
On the 'int pool count' you can set a number and it will get numbers between 1 and the number that you have set.
On the 'int serie count' you can set how many times it needs to get a number.
On 'store next int' you need to set a variable to get the selected int.
On Reset you can set a bool variable and you can set that variable to true if you want to reset the action.
On 'loop event' you need to set a transition to a state (or group of states) that will lead back to the state where 'get random int' is.
On 'finished event' you need to set a transition to a state when you are done using the 'get random int'
Here is a gif showing how to set this up :