yes, it is out of 50, but your internal weightings still need to add up to 100% (of 50). You said the project was 10% (which is 5/50), trial 20% (10/50), an assess. worth 5% (2.5/50) and another assess. worth 15% (7.5/50). As you can see it only adds up to 25 marks out of 50.
Maybe you meant...