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Combination

There are 6 i...

Question

There are 6 items in column-A and 6 items in column-B. A student is asked to match each item in column-A with an item in column-B. The number of possible (correct or incorrect) answers are there to this question is

A

720

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B

620

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C

520

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D

820

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Solution

The correct option is A 720
No of questions in Section A= $6$
No of questions in Section B= $6$
The no .of ways of matching them s given by $6! = 6 \times 5 \times 4 \times 3 \times 2 \times 1 = 720$

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