Regardless of whether you pass or fail them, they will be called in again. So don't worry about failing them, you'll get that call again soon enough.
You'll know if you've passed or failed because the green marker will be dimmed or lit depending on the circumstances.
Quote: "Don't worry. Any radio missions that you fail WILL be called in again.
You won't have to start again. Just use the above list to find out which one it was you failed and follow the instructions for it to be called in again.
They will be called in again after you complete the game also.
Hope this was what you were looking for.