Final answer:
In Excel, to display majors occuring only once within a range, insert the formula =UNIQUE(FILTER(G2:G42, COUNTIF(G2:G42, G2:G42)=1)) in cell L3. This utilizes the UNIQUE function to return unique values and the COUNTIF function to filter occurrences.
Step-by-step explanation:
To display a list of majors that occur only once within the range G2:G42 in cell L3, you can use the UNIQUE function combined with the COUNTIF function in Excel. Here's the formula you should insert in cell L3:
=UNIQUE(FILTER(G2:G42, COUNTIF(G2:G42, G2:G42)=1))
The UNIQUE function returns unique values from a range or array. The COUNTIF function is used to count the number of times each major occurs within the specified range. By setting the criterion to 1, you filter the list to only those majors that occur exactly once. The FILTER function is then used to extract these unique values based on the criterion provided by COUNTIF.
Remember, Excel functions are case-insensitive, so it doesn't matter if you type them in uppercase or lowercase.