Recently, the answers of a test held nationwide were leaked to a group of unscrupulous people. The investigative agency has arrested the mastermind and nine other people A, B, C, D, E, F, G, H and I in this matter. Interrogating them, the following facts have been obtained regarding their operation. Initially the mastermind obtains the correct answer-key. All the others create their answer-key in the following manner. They obtain the answer-key from one or two people who already possess the same. These people are called his/her ‘sources’. If the person has two sources, then he/she compares the answer-keys obtained from both sources. If the key to a question from both sources is identical, it is copied, otherwise it is left blank. If the person has only one source, he/she copies the source’s answers into his/her copy.
Finally, each person compulsorily replaces one of the answers (not a blank one) with a wrong answer in his/her answer key.
The paper contained 200 questions; so the investigative agency has ruled out the possibility of two or more of them introducing wrong answers to the same question. The investigative agency has a copy of the correct answer key and has tabulated the following data. These data represent question numbers.
Table 1: Test Results Table
Name | Wrong Answer(s) | Blank Answer(s) |
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A | 46 | - |
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B | 96 | 46, 90, 25 |
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C | 27, 56 | 17, 46, 90 |
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D | 17 | - |
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E | 46, 90 | - |
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F | 14, 46 | 92, 90 |
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G | 25 | - |
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H | 46, 92 | 25 |
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I | 27 | 17, 46, 90 |
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