You have an universal set of 250 elements and two its subsets, M (=Math) of 110 elements and E (=English) of 200 elements.


The union of the subsets M and E contains 250-75 = 175 elements.


Now use the formula


    n(M U E) = n(M) + n(E) - n(M n E)


for the numbers of elements.


From this formula,


    n(M n E) = n(M) + n(E) - n(M U E) = 110 + 200 - 175 = 135.


Answer.  135 freshman take both Math and English.