Failing may make you slightly better equipped the next time. The most important thing is to keep trying.
If you've got a 10% chance of making it each time, just keep trying 22 times and you'll success 90% of the time.
If you've got a 10% chance of making it each time, just keep trying 22 times and you'll success 90% of the time.
therefore the chance of you trying 22 times and failing each time is around 10%.
therefore the chance of you succeeding in 22 tries is 90%.