count if a match occurs



I have two rows - say Row 1 and Row 2.
In the first row I have a answer key.
In the second row I have answers from a student.
I would like to write a formula where it counts how many answers student got write.

Here is a example:
Row 0: Q1 Q2 Q3 Q4 Q5 Q6
Row 1: 1 4 2 3 4 1
Row 2: 3 4 1 3 4 1

So student marked 4 questions correctly: Q2, Q4, Q5 and Q6.
Hence, the formula should return 4.

I know one way to do it but I am sure there is more efficient way to do it.
The way I know: Use if statement to compare two corresponding entries and output 1 if they match and 0 if not - and then sum it up.
Clearly this solution is not efficient. So how can I do it efficiently?
Thanks in advance for your help.

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T. Valko

Try this...

A1:F1 = answer key
A2:F2 = students answers


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