Final answer:
To find the total number of students in the class, we can use the information that 90% of the class got a sticker. Setting up a proportion, we find that there are 30 students in the class.
Step-by-step explanation:
To find the total number of students in the class, we can use the information that 90% of the class got a sticker. We know that 90% is equal to 27 students, so we can set up a proportion:
90/100 = 27/x
Cross-multiplying, we get:
90x = 2700
Dividing both sides by 90, we find that x = 30.
Therefore, there are 30 students in the class.