Quick, clean, and to the point

Score quiz answers with key

Excel formula: Score quiz answers with key
Generic formula 

To score a quiz and count correct and incorrect answers based on an answer key, you can use a basic array formula. In the example shown, the formula in I7, copied down, is:


where key is the named range C4:G4.

Note: This is an array formula. In Excel 365, enter normally. In older versions of Excel, you must enter with control + shift + enter.


This formula uses the named range key (C4:G4) for convenience only. Without the named range, you'll want to use an absolute reference so the formula can be copied.

In cell I7, we have this formula:


working from the inside-out, this expression is evaluated first:

C7:G7=key // compare answers to key

The result is an array of TRUE FALSE values like this:


TRUE values indicate a correct answer, FALSE values indicate an incorrect answer.

To coerce the TRUE and FALSE values to numbers, we use a double negative:

--({TRUE,TRUE,TRUE,FALSE,TRUE}) // get 1's and 0's

The is an array of 1's and 0's delivered directly to the SUM function:

=SUM({1,1,1,0,1}) // sum correct

The SUM function then returns the final result, 4.

Incorrect answers

The formula in J7 counts incorrect answers in almost the same way:


The only difference is that we are now using the not equal to (<>) logical operator:


Percent correct

The formula in K7 calculates the percentage of correct answers like this:

=I7/COUNTA(key) // divide correct by total

Cell I7 already contains the count of correct answers. This is divided by the total count of quiz answers, which is calculated with the COUNTA function:

COUNTA(key) // count total

The result is formatted with the percentage number format.

Dave Bruns

Excel Formula Training

Formulas are the key to getting things done in Excel. In this accelerated training, you'll learn how to use formulas to manipulate text, work with dates and times, lookup values with VLOOKUP and INDEX & MATCH, count and sum with criteria, dynamically rank values, and create dynamic ranges. You'll also learn how to troubleshoot, trace errors, and fix problems. Instant access. See details here.

Download 100+ Important Excel Functions

Get over 100 Excel Functions you should know in one handy PDF.

Excel foundational video course
Excel Pivot Table video training course
Excel formulas and functions video training course
Excel Charts video training course
Video training for Excel Tables
Dynamic Array Formulas