The passing marks out of 50 depend on the specific exam and the passing criteria set by the examination board. However, some general guidelines can be found in the search results. Here are some examples:

• In a university exam where 50 marks are converted to 80 marks, and the minimum passing marks for 80 marks are 32, the minimum passing marks out of 50 would be 20.

• In most exams, the passing percentage is 40%. Therefore, if an exam is out of 75 marks, the passing marks would be 30 (40% of 75). Similarly, passing marks out of 50 would be 20.

• In some cases, the passing marks out of 50 may be different. For example, one search result states that 17 marks out of 50 is considered passing.

Its important to note that passing marks can vary depending on the specific exam and the passing criteria set by the examination board. Therefore, its always best to consult the teacher or professor for specific information relating to the coursework.