What are the average marks obtained by these seven students in History?

1. 72.86

2. 27.32

3. 24.86

4. 29.14

5. none of these

4

3.

A man is able to save 15% of his wages, but if his wages were raised by Rs.2 a week and his experience were increased by 10%, his annual savings would be diminished by Rs. 26.What is his weekly wages, a year being takenas 52 weeks exactly.

1. Rs. 15.5

2. Rs. 21 10/13

3. Rs. 17 13/17

4. Rs.17 11/17

5. none of these

4

4.

Kalpesh spends 30% of his monthly salary on domestic expenses. He spends respectively 20% and 10% of the remaining salary on education of children and conveyance. Of the remaining amounts now he spends respectively 20% and 30% on entertainment and maintenance of house. He saves Rs. 5512.50. what is the monthly salary of Kalpesh?

1. Rs. 30,900

2. Rs. 25,800

3. Rs. 21,300

4. Rs. 22,500

5. none of the above

4

5.

Two pipes A & B function simultaneously and fill a tank in 4 hours.Pipe A functioning alone will fill the tank 6 hours faster than B.
How much time the pipe A take to fill the tank if it functions alone?