Home
Class 14
MATHS
The average weight of 45 students in a c...

The average weight of 45 students in a class is 52 kg. 5 of them whose average weight is 48 kg leave the class and other 5 students whose average weight is 54 kg join the class. What is the new average weight (in kg) of the class?

A

52.6

B

`52(2)/(3)`

C

`52(1)/(3)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • AVERAGES

    DISHA PUBLICATION|Exercise Practice Exercises (Foundation Level) |38 Videos

  • AVERAGES

    DISHA PUBLICATION|Exercise Practice Exercises (Standard Level)|25 Videos

  • ALLIGATIONS

    DISHA PUBLICATION|Exercise TEST YOURSELF |15 Videos

  • COORDINATE GEOMETRY

    DISHA PUBLICATION|Exercise TEST YOURSELF|15 Videos

Similar Questions

Explore conceptually related problems

The average weight of 45 students in a class is 52 kg.Five of them whose average weight is 48 kg leave the class and other 5 students whose average weight is 54 kg join the class. What is the new average weight (in kg) of the class? 52(1)/(3) (b) 52(1)/(2) (c) 52(2)/(3) (d) None of these

The average weight of a class of 50 students is 80 kg. If two of the students with weight 40% & 50% of 'x' leave the class & two new students with weight 'x' & 'x - 10' join the class, then the average weight of the class is increased by 2 kg. Find the value of 'x'?

The average weight of a class of 50 students is 80 kg. If two of the students with weight 40% & 50% of 'x' leave the class & two new students with weight 'x' & 'x - 10' join the class, then the average weight of the class is increased by 2 kg. Find the value of 'x'? 1. 80

The average weight of 90 girls in a class is 20. The average weight of a group of 16 girls in the class is 12 kg and the average weight of another 34 girls in the class is 16. What is the average weight of the remaining girls in the class ?

The average weight of students in a class was 60.5 kg. When & students, whose average weight was 65 kg, joined the class, then the average weight of all the students increased by 0.9 kg. The total number of students now in the class is:

The average weight of 25 students of a class is 28 kg. If the average weight of all the boys is 30 kg and average weight of all the girls is 25 kg, then find the number of boys in the class.

DISHA PUBLICATION-AVERAGES-Test Yourself
  1. The average weight of 45 students in a class is 52 kg. 5 of them whose...

    Text Solution

    |

  2. One-fourth of a certain journey is covered at the rate of 25 km/h, one...

    Text Solution

    |

  3. The average of 20 numbers is zero. Of them, at the most, how many may ...

    Text Solution

    |

  4. The average age of A and B is 20 years. If C were to replace A, the av...

    Text Solution

    |

  5. A batsman in his 12th innings makes a score of 65 and thereby increase...

    Text Solution

    |

  6. The batting average for 40 innings of a cricket. player is 50 runs. Hi...

    Text Solution

    |

  7. The mean of 30 values was 150. It was detected on rechecking that one ...

    Text Solution

    |

  8. A car owner buys petrol at 7.50, 8.00 and 8.50 per litre for three su...

    Text Solution

    |

  9. In Arun’s opinion, his weight is greater than 65 kg but less than 72 k...

    Text Solution

    |

  10. The average weight of 5 men is decreased by 3 kg when one of them weig...

    Text Solution

    |

  11. 19 persons went to a hotel for a combined dinner party. 13 of them spe...

    Text Solution

    |

  12. There are a certain number of pages in a book. Arjun tore a certain pa...

    Text Solution

    |

  13. In an exam, the average was found to be x marks. After deducting compu...

    Text Solution

    |

  14. Ten years ago, the ages of the members of a joint family of eight peop...

    Text Solution

    |

  15. I was born 30 years after my father was born. My sister was born 25 ye...

    Text Solution

    |

  16. The average weight of A, B and C is x kg. A and C lose y kg each after...

    Text Solution

    |