Students who fail with single-digit marks but pass after revaluation may have faced issues like misinterpretation of answers, grading errors, or discrepancies in the initial evaluation. Revaluation can uncover these errors, leading to a higher score upon correction.

Hello,

There are a few reasons why this can happen:

1. Mistakes in Evaluation : Sometimes, during the initial exam, the papers might have been wrongly evaluated, and the student may not have received the correct marks. In the revaluation, the paper is checked again, and if errors were made in the marking, the student could get a higher score.

2. Partial Credit : In some cases, the examiner may not have given enough partial credit for answers that were somewhat correct. Revaluation might result in more marks being awarded for the effort shown in the answers.

3. Human Error : It's possible that there was a human error in grading, such as missing out on a page or not awarding full marks for an answer.

4. Re-evaluation of Complex Questions : For certain complicated or subjective questions, the initial examiner might have been strict in marking, while the re-evaluator might be more lenient or interpret the answer differently, leading to higher marks.

These are some of the common reasons why students can end up with significantly higher marks after revaluation.

Hope it helps !