### 5. Three maths classes: A, B and C take an algebra test. The average score of class A is 83. The average score of class B is 76. The average score of class C is 85. The average score of class A and B is 79 and average score of class B and C is 81. What is the average score of classes A, B, C ?

### 6. How many window coverings are necessary to span 50 windows, if each window covering is 15 windows long?

### 8. Sripad has scored average of 65 marks in three objects. In no subjects has he secured less than 58 marks. He has secured more marks in Maths than other two subjects. What could be his maximum score in Maths ?

### 1. The average weight of 45 passengers in a bus is 52 kg. 5 of them whose average weight is 48 kg leave the bus and other 5 passengers whose average weight is 54 kg join the bus at the same stop. What is the new average weight of the bus?

### 2. 12 boys decided to constribute Rs. 750 each to an Orphange. Suddenly few of them boys dropped out and consequently the rest had to pay Rs. 150 more. Then the number of boys who dropped out?

### 3. The average score of boys in an examination in a school is 81 and that of the girls is 83 and the average score of the school is 81.8. Then what will be ratio between the number of girls to the number of boys, in the examination?

### 4. A student's average marks in five subjects is 82. If the average marks of first two subject is 86.5 and the average marks of last two subjects is 84. Find the marks of third subject?

### 5. Five boxes of bananas sell for Rs. 30. how many boxes can you buy for Rs.9?

### 6. Ian has 14 boxes of paper and divides them evenly between 4 coworkers. How many whole boxes did each coworker get?

### 7. There are 100 students in 3 sections A, B and C of a class. The average marks of all the three sections was 84. The average of B and C was 87.5 and the average marks of students in A section was :

### 8. Third proportion of 10 and 20 is

### 9. Find the average of first 50 natural numbers?

### 10. P, Q, R, S, T and U are six consecutive odd numbers and their average is 52. What is the product of P and U ?

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