Countif cell = "something" and related cell (same row) = "something else"

Hello,

Trying to calculate the gender balance in our organization based on column containing M or F but only for those who have paid their fees, indicated by an "X" in another column

So conceptually

Countif(gender,"M") only if Paid = "X"

then convert to text so I can concat(text(count of paid males),  /,  text(count of paid females))

tried

=CONCAT(TEXT(COUNTIF(IF(E9="X",Gender,"M",0)),"#"),"/",TEXT(COUNTIF(IF(E9="X",Gender,"M",0)),"#"))

but E9=X is a fixed value and I need the formula to refer to the value in column E on the same row

Help please, this is beyond me

Thanks

Reg