Question : The weights (in kg) of five girls in a class are 49, 42, 61, 55, and 58. What is the average weight (in kg) of these five girls?

Option 1: 53

Option 2: 54

Option 3: 51

Option 4: 52

Question : In a class of 60 students, there are 35 boys. The average weight of boys is 42 kg and the average weight of the full class is 46.5 kg. Find the average weight of girls in the class.

Option 1: 48.7 kg

Option 2: 49.7 kg

Option 3: 52.8 kg

Option 4: 56.7 kg

Question : There are 15 students in a class. Their average weight is 40 kg. When one student leaves the class, the average weight is 39.5 kg. What is the weight of the student who left the class (where kg means kilogram)?

Option 1: 47 kg

Option 2: 42 kg

Option 3: 52 kg

Option 4: 48 kg

Question : The average weight of 12 persons increases by 3.5 kg when a new person comes in place of one of them weighing 58 kg. The weight of the new person is:

Option 1: 100 kg

Option 2: 16 kg

Option 3: 70 kg

Option 4: 42 kg

Question : In a class of 60 students, 20 are girls. The average weight of the boys in the class is 40 kg, while that of all the girls is 35 kg. What is the average weight (in kg) of the entire class (correct to two decimal places)?

Option 1: 36.67

Option 2: 38.33

Option 3: 33.33

Option 4: 40.67

Question : The sum of weights of A and B is 80 kg. 50% of A's weight is $\frac{5}{6}$ times the weight of B. Find the difference between their weights.

Option 1: 20 kg

Option 2: 10 kg

Option 3: 25 kg

Option 4: 15 kg