Question : The average of 20 numbers is 30 and that of the other 30 numbers is 50. What is the average of all the numbers?

Option 1: 42

Option 2: 47

Option 3: 44

Option 4: 45

Question : In a class, the average weight of 4 boys is 50 kg and the average weight of 4 girls is 40 kg. What is the average weight of all the 8 students taken together?

Option 1: 44 kg

Option 2: 48 kg

Option 3: 45 kg

Option 4: 42 kg

Question : The average of 4 numbers is 45. The average of the first two numbers is thrice the average of the other two numbers. What is the sum of the first two numbers?

Option 1: 122

Option 2: 105

Option 3: 125

Option 4: 135

Question : The average of 5 numbers is 48. The average of the two numbers is 40 while the average of the other two is 58. Find the value of the remaining number.

Option 1: 44

Option 2: 34

Option 3: 40

Option 4: 30

Question : The average of 9 numbers is 47. If a number is removed, then the average becomes 48. Which number was removed?

Option 1: 39

Option 2: 42

Option 3: 45

Option 4: 40