It is commonly said that those who are good in Mathematics are not good in English. A teacher tried to observe 4 sections of grade 10 students. She recorded that 40% of the surveyed students were good in Mathematics, 65% were not good in English, and 15% were good in Mathematics but not in English. What is the probability that a student chosen at random from the respondents was not good in English, given that he/she was good in Mathematics?

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