If a multiple choice test has 10 questions of which one is answered A, 4 are answered B, 3 are answered C, and 2 are answered D, how many answer sheets are possible?
ty!!!
If a multiple choice test has 10 questions of which one is answered A, 4 are answered B, 3 are answered C, ...?
2010-05-23 10:11 pm
回答 (2)
2010-05-23 10:20 pm
not quite sure but....
10 questions each with 4 choices...
total choices...40
total answer sheets possible...
40C1 + 39C4 + 35C3 + 32C2
10 questions each with 4 choices...
total choices...40
total answer sheets possible...
40C1 + 39C4 + 35C3 + 32C2
2010-05-23 10:14 pm
there's not enough information supplied in your question.
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