Answer: 600 students
Step-by-step explanation: 5% of students is equal to 30 students using that information we know students who own Reptiles are 30 since it is also 5% so its 60 then 10% own fish so therefore it is two times 5%, also 60. Thats 120. Cats have 35% if 5% equals 30 we can substitute 30 for 5 so 5x7 =35 now 30x7 is now 210 add the values so far to 330. 45% of people own dogs so we follow the same steps 5x9=45 30x9=270 add values.
Answer is 600!