Student Plant Growth Project

In a science class, the students are conducting a project where they observe the growth of plants. Each student has a different variety of plant. Let the number of students be represented by s, the number of plants each student has be represented by p, and the total number of plants is 48. Additionally, it was observed that 3/4 of the students have 2 plants each, while the remaining 1/4 of the students have 4 plants each. How many students are there in the class?