Sum up drop down lists in Excel

Question

I have 4 drop down lists in Excel with the possible choice of either Yes or No as the two options. I also have conditional formatting too which makes a nice red/green colour.

I need a way to cout how many of the boxes have been set to Yes, I have tried =SUMIF(A1:A4, "Yes") but this hasn't worked. I will include a screenshot of my simple worksheet.

Answer 1

use countif

=COUNTIF(A:A,"yes")