Suppose there is an exam that you can pass if you answer only 6 out of 8 questions correctly. Each question is from one of 12 subjects in total.
what if you don't have much time to study, so you need to minimize your work? Studying your favorite six only? Or top 8 for insurance?
Unfortunately, the only possible way to have your 6 answers fully is to study more than 10 subjects. Too obvious? Sorry.
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