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The average weight of 60 students in a c...

The average weight of 60 students in a class is 56.4 kg. If 12 students having average weight of 59.5 kg leave the class and 15 students having average weight 54kg join the class, then what is the average weight ( in kg) of the students in the class (correct to one decimal place)?
किसी कक्षा में 60 छात्रों का औसत वज़न 56.4 किलो ग्राम है | यदि 59.5 किलो ग्राम औसत वज़न वाले 12 छात्र कक्षा से चले जाते हैं और 54 किलो ग्राम औसत वज़न वाले 15 छात्र कक्षा में आ जाते हैं | कक्षा में छात्रों का औसत वज़न (किलो ग्राम में ) ज्ञात करें | (एक दशमलव स्थान तक )

A

56.1

B

55.2

C

`58.0`

D

54.9

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PINNACLE-AVERAGE-EXERCISE
  1. In a class, the number of girls is 60% more than that of boys. The ave...

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  2. The average of 15 numbers is 45. The average of the first six numbers ...

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  3. The average weight of 60 students in a class is 56.4 kg. If 12 student...

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  4. The average of a few numbers is 48. If 75% of the numbers are increase...

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  5. The number of students in classes A and B are 60 and 70, respectively....

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  6. There are three positive numbers. If the average of any two of them is...

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  7. The average of 12 numbers is 18.5. The average of first six numbers is...

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  8. There are 96 students in a class, out of which the number of girls is ...

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  9. The average temperature of one week was 30^@ c . If the average tempe...

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  10. The daily average rainfall on 5 days of the week is 30 mm.If the rainf...

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  11. The average weight of 8 gold coins is 20 g per coin. The average weigh...

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  12. The average of a, b and c is 9. The average of b and c is 10. What is ...

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  13. The average of a and b is 36. The average of b and c is 42. What is th...

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  14. How many kg of salt costing Rs. 28 per kg must be mixed with 6.6 kg of...

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  15. A family has two grandparents, two parents and four children. Two year...

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  16. Age of A is 6 years more than three times the age of B. After three ye...

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  17. A person was asked to guess his own weight. He estimated his weight to...

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  18. Out of 6 numbers, the sum of the first 5 numbers is 7 times the 6th nu...

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  19. The average of the first four numbers is three times the fifth number....

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  20. The average of five consecutive even numbers is M. If the next five ev...

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