how to find if a number falls between 2 values(not solved but can't change)

[unibiggle]

In my darts statistics sheet I have columns that keep track of all sores between 0-19, 20-3, 40-59 and so on. On my mac I used count if to check if it fell between the 2 particular values but when I open in docs to go or office suite on my tablet it says the function is not supported. Can I do it with a different function so it will work non mobile and tablet?
Thanks
Excel novice:o