SOLUTION: Please help.
A test consist of 15 multiple choice questions, with each questions having 4 possible answer. In how many ways can a student check two correct answer.
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A test consist of 15 multiple choice questions, with each questions having 4 possible answer. In how many ways can a student check two correct answer.
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Question 1185669: Please help.
A test consist of 15 multiple choice questions, with each questions having 4 possible answer. In how many ways can a student check two correct answer. Answer by ikleyn(52778) (Show Source):
As it is worded, printed, posted and presented, this problem is INCOMPLETE.
To be complete, it MUST say that among 4 possible answers to each question ONLY ONE ANSWER is correct.
If we accept this assumption / (axiom), then the ANSWER is = = 15*7 = 105.
Solved.
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But if we do not accept that axiom/assumption, then the answer can be different.
