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How many ways can a student select 7 questions from an exam containing 11 questions if he must answer the last question?
Wiki User
∙ 11y ago
If he must answer the last question, he effectively needs to select 6 from 10. This can be done in 10C6 = 10*9*8*7/(4*3*2*1) = 210 ways.
Wiki User
∙ 11y ago
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How many ways can a student select 5 questions from an exam containing twelve questions if he must select the last question?
If he must include the last question, then his choices really boil down tohow many ways he can select 4 more from the remaining 11.The number of ways he can select 4 from 11 is (11 x 10 x 9 x 8) = 7,920 ways .But each group of 4 can be selected in 24 different ways.So he can only wind up with 7920/24 = 330 different groups of questions.
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How many ways can a student select 5 questions from an exam containing twelve questions if he must select the last question?
If he must include the last question, then his choices really boil down tohow many ways he can select 4 more from the remaining 11.The number of ways he can select 4 from 11 is (11 x 10 x 9 x 8) = 7,920 ways .But each group of 4 can be selected in 24 different ways.So he can only wind up with 7920/24 = 330 different groups of questions.
How many ways can a student select five questions from an exam containing 12 questions if he must answer the last question?
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.
A student has an exam with 30 questions. They are to select 10 of these questions to answer. In how many ways can they complete this exam?
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How many subjects student select 12 class?
In the UK it is mandatory, so the question of selection does not arise.
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You select extra questions then you are asked for a password and it is traffic
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i think they just select the good questions!
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