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Find the average of 22 kg, 24 kg, 33 kg,...

Find the average of 22 kg, 24 kg, 33 kg, 42 kg, and 39 kg.

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The correct Answer is:
32 kg
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The average weight of students in a class is 43 kg. Four new students are admitted to the class whose weights are 42 kg, 36.5 kg, 39 kg and 42.5 kg respectively. Now the average weight of the students of the class is 42.5 kg. The number of students in the beginning was

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PEARSON IIT JEE FOUNDATION-RATIO AND ITS APPLICATIONS-SHORT ANSWER TYPE QUESTIONS
  1. Divide Rs. 175 in the ratio 1:2:4.

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  2. Find the fourth proportional of 2,3, and 6.

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  3. Find the average of 22 kg, 24 kg, 33 kg, 42 kg, and 39 kg.

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  4. Find the amount .Rs. 2500 for 3 years at 12% per annum.

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  5. Find the amount when Rs. 3650 for 2 years 6 months at 16% per annum.

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  6. If a:b = 5:6 and b:c = 3:4, then find a:b:c.

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  7. The cost of 12 books is Rs. 144. Find the cost of 18 books.

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  8. Twelve men are required to complete a work in 24 days.How many men are...

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  9. In a class, there are 20 boys and 15 girls. What percentage of the num...

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  10. By selling a television for Rs. 6600, a trader gains 10%. Find the cos...

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  11. The average height of 20 boys is 120 cm and the average height of 10 g...

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  12. A piece of cloth which is 10 m in length is cut into two pieces such t...

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  13. The ratio of the costs of two vehicles is 3:2 and the total cost of th...

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  14. If a number is divided into three parts which are in the raio 1:1:2, ...

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  15. In a right triangle, the length of the sides is in the ratio 5:4:3. Fi...

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  16. The price of a commodity is reduced to its (5)/(6) th. What is the ...

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  17. Find a number such that the ratio of (5)/(2) to the number is the sam...

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  18. Town A is 200 km for from town B. A person can travel in a car from to...

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  19. Ajay's home is 150 m away from a bus stop. At what speed should he tra...

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  20. Find the time taken by a car running at 25 m/s to cover a distance of ...

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