If you make the assumption - without any justification - that all questions are worth the same, then each one is worth 1/35 of the total for the exam.
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points is each question worth on a 12 question exam?
If each question has the same "weight" (value), then each question would be worth 100% / 40 = 2.5%. However, it is also possible that some questions have more weight than others. In this case, 2.5% is simply the average value of each question.
to find any grade ever no matter how many questions there are, as long as theyre all worth the same. Plug in the numbers: number of questions you got right divided by the number of questions on the exam and then multiple by 100. You got a 75
Well, honey, if you want a 70 percent on a 210-question exam, you can afford to get 63 questions wrong. Just make sure you don't mess up more than that, or you'll be singing a different tune. Good luck, sweet cheeks!
330 ways. Once we know he must answer the last question, the issue is really one of choosing 4 questions from the first 11 questions on the exam. There are 11 ways to choose the first question, 10 ways to choose the second, 9 ways to choose the third, and 8 ways to choose the fourth, so that would be 11*10*9*8... but the order of the questions doesn't matter. So we divide by the number of ways to rearrange the 4 questions (4*3*2*1=24), to get 330.