Home
Class 14
MATHS
The average age of boys in a class is 16...

The average age of boys in a class is 16.66, while the average age of girls is 18.75. Thus the average age of all the 40 students of the class is 17.5.If the difference between the no. of boys and girls is 8, then the no. of girls in the class is:

A

12

B

16

C

18

D

Data insufficient

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • AVERAGES

    QUANTUM CAT|Exercise QUESTION BANK|171 Videos

Similar Questions

Explore conceptually related problems

The average age of boys in class is 16.66, while the average age of girls is 18.75. Thus the average age of all the 40 students of the class is 17.5. If the difference between the no. of boys and girls is 8, then the no. of girls in the class is :

The average age of r boys in a class is a years. If the average age of s of them is b years, them what is the average age of the remaining boys ?

The average age of 30 girls is 13 yr. The average of first 18 girls is 15 yr. Find out the average age of remaining 12 girls.

The average age of 12 boys is 15 years and the average age of 18 girls is 12 years .What is the conbined average age of the boys and girls ,taken together ?

The average marks of 48 students in a class is 45. the average marks of the boys in the class is 40 and average marks of the girls in the class is 50. what is the ratio between the numbers of boys and the number of girls in the class ?

QUANTUM CAT-ALLIGATIONS-QUESTION BANK
  1. Mr. Mittal purchased two steel factories, one in India and other one i...

    Text Solution

    |

  2. In a 25 litre mixture of milk and water, the water is only 20%. How ma...

    Text Solution

    |

  3. A milkman sells the milk at the cost price but he mixes the water (fre...

    Text Solution

    |

  4. The price of petrol is rs 60 per litre and the price of spirit is rs 4...

    Text Solution

    |

  5. A trader sells total 315 TV sets. He sells black and white TV sets at ...

    Text Solution

    |

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

    Text Solution

    |

  7. Baniya sells two types of tea viz. Desi chai and Videshi chai. He sell...

    Text Solution

    |

  8. The average age of boys in a class is 16.66, while the average age of ...

    Text Solution

    |

  9. The ratio of water and alcohol i two different containers is 2:3 and 4...

    Text Solution

    |

  10. The average marks of the students in four sections A, B, C and D toget...

    Text Solution

    |

  11. The diluted wine contains only 8 litres of wine and the rest is water....

    Text Solution

    |

  12. The average weight of the boys in a class is 30kg and the average weig...

    Text Solution

    |

  13. The shopkeeper mixed 40 kg refined oil with vegetable oil worth rs 60 ...

    Text Solution

    |

  14. In a mixture of a milk and water, there is only 26% water. After repla...

    Text Solution

    |

  15. The ratio of expenditure and savings is 3:2. If the income increases b...

    Text Solution

    |

  16. 4kg of metal contains 1/5 copper and rest is zinc. Another 5 kg of met...

    Text Solution

    |

  17. 450 litres of a mixture of milk and water contain the milk and water i...

    Text Solution

    |

  18. The ratio of petrol and kerosene is the container is 3:2 when 10 litre...

    Text Solution

    |

  19. From a container, 6 litres milk was drawn out and was replaced by wate...

    Text Solution

    |

  20. A milkman brings 100 litres pure milk from a dairy farmer and he sells...

    Text Solution

    |