How much marks you should score to pass in lab external out of 50?

The minimum marks required to pass in an external laboratory practical exam out of 50 marks may vary depending on the institution, course, and specific regulations set by the examining authority. Typically, a passing grade is determined based on a set of criteria established by the institution.

Generally, scoring around 40% or more of the total marks is considered a passing grade in a lab external practical exam. However, it's essential to refer to the specific guidelines provided by your institution or the examination board for accurate information regarding the passing marks and grading system.

Here's an illustration of how the passing marks might be calculated:

Total marks for the lab external practical exam: 50

Passing marks (assuming 40% of the total): 50 x 40% = 20 marks

In this scenario, scoring 20 marks or higher would be considered a passing grade for the lab external practical exam. It's important to keep in mind that these figures are merely an example, and the actual passing marks may vary according to the institution's regulations.

It's advisable to consult the official course handbook, syllabus, or relevant academic documents provided by your institution to ensure you understand the exact passing criteria and requirements for lab external practical exams.