If a candidate is given an exam of 40 questions, should get 25 marks to pass (61%) and should get 80% for distinction, what is equivalence class.
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23, 24, 25
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0, 12, 25
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30, 36, 39
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32,37,40
Equivalence partitioning creates tests for each equivalence class. The classes are: fail (0-24), pass (25-31), distinction (32-40). Option D tests all three: 32 (distinction boundary), 37 (distinction interior), 40 (maximum/distinction boundary). Options A and B only test one class each. Option C has 30 in pass class but 36 and 39 in distinction class, missing fail class entirely.
To determine the equivalence class, we need to consider the passing marks and the criteria for distinction.
Given that the passing marks are 25 (or 61% of the total marks), any score below 25 will result in a failing grade. Therefore, we can eliminate options A and B since they include values below 25.
For distinction, a candidate should score 80% or above. Considering that the total number of questions is 40, we can calculate the minimum number of correct answers required for distinction:
Minimum number of correct answers for distinction = 80% of 40 = 0.8 * 40 = 32
Therefore, any score less than 32 will not meet the criteria for distinction. Based on this, we can eliminate option C.
Now, we are left with option D, which includes values 32, 37, and 40. These values fall within the range of passing marks and also meet the criteria for distinction. Hence, the correct answer is option D.