SOLUTION: A student must answer 7 questions on a 12 question test. How many ways can a student do this, and how many ways are there if the student must answer the first and last questions?
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Question 1155078: A student must answer 7 questions on a 12 question test. How many ways can a student do this, and how many ways are there if the student must answer the first and last questions? Answer by ikleyn(52786) (Show Source):
The student can select 7 questions from 12 questions by ways.
It is the number of combinations of 12 items taken 7 at a time.
= = .
Calculate it using your calculator.
