Home
Class 14
MATHS
In a class of 30 students, the average w...

In a class of 30 students, the average weight of boys is 20kg and the average weight of the girls is 25kg. The fraction of boys out of the total students of the class is :

A

`4/5`

B

`5/6`

C

`3/4`

D

Data is insufficient

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ALLIGATIONS

    DISHA PUBLICATION|Exercise PRACTICE EXERCISES (STANDARD LEVEL) |17 Videos

  • ALLIGATIONS

    DISHA PUBLICATION|Exercise PRACTICE EXERCISES (EXPERT LEVEL) |15 Videos

  • ALLIGATIONS

    DISHA PUBLICATION|Exercise TEST YOURSELF |15 Videos

  • AVERAGES

    DISHA PUBLICATION|Exercise Test Yourself|15 Videos

Similar Questions

Explore conceptually related problems

In a class of 30 students, the average weight of boys is 20 kg and the average weight of the girls is 25 kg. The fraction of boys out of the total students of the class is :

In a class of 100 students, the average weight is 30 kg. If the average weight of the girls is 24 kg and that of the boys is 32 kg, then what is the number of girls in the class ?

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.

The average weight of girls is 15 and the average weight of boys is 30 and the average weight of the boys and the girls both is 25. If the number of boys are 12, then the number of girls is :

The average weight of girls is 15 and the average weight of boys is 30 and the average weight of boys and girls both is 25. If the number of boys are 12, then the number of girls is :

In a class, there are 30 boys and 20 girls. The average weight of 30 boys is 60 kg and average weight of 20 girls is 35 kg. Find the average weight of the class.

DISHA PUBLICATION-ALLIGATIONS -PRACTICE EXERCISES (FOUNDATION LEVEL)
  1. A mixture of a certain quantity of milk with 16 litres of water is wor...

    Text Solution

    |

  2. In my pocket there are rs 25 consisting of only the denominations of 2...

    Text Solution

    |

  3. There are some shepherds and their sheep in a grazing field. The no. o...

    Text Solution

    |

  4. If 5 kg of salt costing Rs. 5/kg and 3 kg of salt costing Rs. 4/ kg ar...

    Text Solution

    |

  5. In what ratio should two qualities of coffee powder having rates of 4...

    Text Solution

    |

  6. In what ratio should milk and water be mixed so that after selling the...

    Text Solution

    |

  7. Gold is 19 times as heavy as water and copper is 9 times as heavy as w...

    Text Solution

    |

  8. In a mixture of 120 litres, the ratio of milk and water is 2:1. If the...

    Text Solution

    |

  9. In a mixture of 45 litres, the ratio of milk and water is 4 : 1. How m...

    Text Solution

    |

  10. In a class of 30 students, the average weight of boys is 20kg and the ...

    Text Solution

    |

  11. Acid and water are mixed in a vessel A in the ratio of 5 :2 and in the...

    Text Solution

    |

  12. A container has a capacity of 20 gallons and is full of spirit. 4 gall...

    Text Solution

    |

  13. A jar full of whisky contains 40% alcohol. A part of this whisky is re...

    Text Solution

    |

  14. A dishonest grocer professes to sell pure butter at cost price, but he...

    Text Solution

    |

  15. A merchant purchased two qualities of pulses at the rate of 200 per qu...

    Text Solution

    |

  16. There are two mixtures of honey and water, the quantity of honey in th...

    Text Solution

    |

  17. Two solutions of 90% and 97% purity are mixed resulting in 21 litres o...

    Text Solution

    |

  18. A 20 percent gain is made by selling the mixture of two types of ghee ...

    Text Solution

    |

  19. A man makes 60 articles in the 1st hour. His efficiency decreases by 2...

    Text Solution

    |

  20. There are two solutions of Sulphuric acid (acid + water) with concentr...

    Text Solution

    |