The number of subscribers to Chinese newspapers is 3/4*4/9= 1/3 of the whole school.
Mathematics newspaper is 5/8 of the subscription newspaper, and the whole school is 3/4*5/8= 15/32.
Language newspaper and mathematics newspaper * * * account for 1/3+ 15/32=77/96.
People who subscribe to newspapers account for 3/4 of the whole school.
77/96-3/4=5/96 people booked both.
***25 people
Then the number of students in the whole school is 25*96/5=480.