Selecting certain data using IF statements in pivot table

Hello, I am currently using a pivot table to organize my data. I want take the average of certain numbers in a column only IF the column next to it corresponds to FALSE. Is this possible? For example:
A1(NUMBERS) A2(USE)
2 FALSE
3 TRUE
5 FALSE

So I only would want to take the average between 2 and 5. Thank you so much!

Do you mean 2 THROUGH and including 5 OR just the value of 2 and the value of 5?