In an admission test,there are 15 multip...

In an admission test,there are 15 multiple choice questions. Each question is followed by 4 alternatives to choose. Out of these there may be one or more than one correct answers. If a student attempts all the 15 question and marks the answers randomly the question paper is

`""^(4xx15)C_(4)`

`15^(15)`

`4^(15)`

4!. 15!

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