Answer:
All of the attempts failed.
Step-by-step explanation:
The first attempt was called operation Eagle Claw. This was initiated using 8 helicopters. But 3 of them got shot down and failed to get to the destination. They needed a minimum of 6 helicopters in order to initiate the rescue mission. Because of this, the first attempt was considered a failure.
The second attempt was called operation Honey Badger. This time, they used more than 50 aircraft to conduct the rescue mission. But it still ended up in failure.
The hostages were let go during the Reagan's administration, not carter. Soon after Reagan unfreezes around 8 Billion dollars worth of frozen Iranian Assets.