What is the difference between the number of male students studying freestyle in schools B and D together and the total number of female students studying the same in the same schools together?

Number of students learning free style in school B = 28 % of 400 = 112
Number of male students learning freestyle dance in school B = 112 (7/16) = 49
Number of female students learning freestyle dance in school B = 112 (9/16) = 63
Number of students learning free style in school D = 24 % of 300 = 72
Number of male students learning freestyle dance in school D = 72 (9/12) = 54
Number of female students learning freestyle dance in school D = 72 (3/12) = 18
Number of male students learning freestyle dance in school B and D = 49 + 54 = 103
Number of female students learning freestyle dance in school B and D = 63 + 18 = 81
Difference = 103 -81 = 22
Option A is the correct answer