Question : The total number of students in sections A and B of a class is 72. The ratio of the number of students in A and B is 7 : 5. The average weight (in kg) of the students in section B is 20% more than that of the students in section A. If the average weight of all the students in the class is 52 kg, then what is the average weight (in kg) of the students in section B?

Option 1: 57.6

Option 2: 57.9

Option 3: 56.4

Option 4: 58.2

Question : The average weight of some students in a class was 60.5 kg. When 8 students, whose average weight was 65 kg, joined the class, then the average weight of all the students increased by 0.9 kg. The number of students in the class, initially, was:

Option 1: 37

Option 2: 42

Option 3: 32

Option 4: 40

Question : The average weight of 8 students is 48 kg. If four students with an average weight of 44 kg and four with an average weight of 58 kg are also added, then find the average weight of 16 students.

Option 1: 49.5 kg

Option 2: 48 kg

Option 3: 49 kg

Option 4: 48.5 kg

Question : The average weight of A, B and C is 65 kg. If the average weight of A and B is 63.5 kg, and the average weight of A and C is 67.5 kg, then the weight of A (in kg) is:

Option 1: 67

Option 2: 60

Option 3: 68

Option 4: 65

Question : There are 50 students in a class with an average weight of 45 kg. When one student leaves the class, the average weight reduces by 100 g. What is the weight of the student who left the class?

Option 1: 45 kg

Option 2: 47.9 kg

Option 3: 49.9 kg

Option 4: 50.1 kg

Question : The average weight of A, B, and C is 65 kg. If the average weight of C and B is 61.5 kg, and the average weight of A and C is 68.5 kg, then the weight of C (in kg) is:

Option 1: 65

Option 2: 60

Option 3: 68

Option 4: 67