Answer :

**Given:** The number of items in column A = 6 and in column B = 6

A student is asked to match each item in column A with an item in column B

**To find:** Possible number of correct or incorrect answers which he can give

Let the items of column A are fixed i.e. they arrangement is not changing

Now, we just have to arrange items of column B

**Formula used:**

Number of arrangements of n things taken all at a time = P(n, n)

∴ The total number of ways in which this can be done

= the number of arrangements of 6 things taken all at a time

= P(6, 6)

{∵ 0! = 1}

= 6 × 5 × 4 × 3 × 2 × 1

= 720

**Hence, possible number of correct or incorrect answers which a student can give are 720**

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