Find out the missing number ?

--The missing number is 4.

--From first figure's column, we find (8+9)= 17.

--From the row, we find (5+6+6) = 17.

--From second figure's column, we find (8+3)= 11.

--From the row, we find (2+8+1)=11. --Similarly, from the last figure's column, we find (6+7)= 13.

--From row, we find (4+4+5)= 13.