5. There are 211 students and four different types of chocolate, with each type having more than 633 pieces. It is stipulated that each student can take at most three chocolates, or they can choose not to take any. If the students are grouped according to the types and quantities of chocolates they take, then the largest group will have at least $\qquad$ students.
【Answer】 7
【Analysis】 The number of chocolates a student can take is $0, 1, 2, 3$, corresponding to the types of chocolates taken:
Taking 0, there is 1 case;
Taking 1, there are 4 ways to take;
Taking 2, 2 of the same kind have 4 ways to take, 2 of different kinds have $C_{4}^{2}=6$ ways to take, a total of 10 ways;
Taking 3, 3 of the same kind have 4 ways to take, 2 of the same kind have $4 \times 3=12$ ways to take, 3 of different kinds have $C_{4}^{3}=4$ ways to take, a total of 20 ways. Therefore, the combinations of types and quantities of chocolates that students can get are $1+4+10+20=35$ kinds; $211 \div 35=6 \cdots 1$, the largest group must have at least 7 people.