Home
Class 14
MATHS
The average age of three boys is 25 year...

The average age of three boys is 25 years and their ages are in the ratio 3:5:7 . The age of the youngest boy is :

A

21 years

B

18 years

C

15 years

D

9 years

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • RATIO & PROPORTION

    MAHENDRA|Exercise EXERCISE|30 Videos

  • PROFIT AND LOSS

    MAHENDRA|Exercise EXERCISE (PROFIT AND LOSS)|25 Videos

  • SIMPLE INTEREST & COMPOUND INTEREST

    MAHENDRA|Exercise EXERCISE|30 Videos

Similar Questions

Explore conceptually related problems

The average age of three boys is 25 years and their af age in the proportion 3:5:7. The age of the youngest boy is 9backslash years b.15 years c.18backslash years d.21 years

The average age of three boys is 16 years. If their ages are in the ratio 4:5:7, then the age of youngest boy is

The average age of three boys is 15yr . If the ratio of their ages is 3:5:7 , what is the age of the oldest boy ?

The average age of 3 persons is 30 years.If their ages are in the ratio of 3:5:7 respectively, then the age ofthe eldest person is:

24.The average age of three boys is x years and that of four others is (x+7) years.The average age of these seven boys is 16 years.Find the value of x

In a colony, the average age of the boys is 14 years and the average age of the girls is 17 years. If the average age of the children in the colony is 15 years, find the ratio of number of boys to that of girls.

The average age of 7 members of a family is 40 years. In the family, there are three men, three women and one boy. If the average age of three men is 48 years and average age of three women is 44 years, then the age of boy is:

The average age of 5 boys is 20. If the average age of 4 of them is 18, find the age of the fifth boy.

MAHENDRA-RATIO & PROPORTION -EXERCISE
  1. In a mixture of 60 litres, the ratio of milk and water is 2:1. If this...

    Text Solution

    |

  2. The ratio between two numbers is 3:4 and their L.C.M is 180. The first...

    Text Solution

    |

  3. An alloy is to contain copper and zinc in the ratio 9:4. If quantity o...

    Text Solution

    |

  4. 60 Kg of an alloy A is mixed with 100 kg of alloy B .If alloy A has le...

    Text Solution

    |

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

    Text Solution

    |

  6. 15 litres of mixture contains 20% alcohol and the rest of water. If 3 ...

    Text Solution

    |

  7. 20 litres of a mixture contains milk and water in the ratio 5:3 . If 4...

    Text Solution

    |

  8. The average age of three boys is 25 years and their ages are in the ra...

    Text Solution

    |

  9. The speeds of three cars are in the ratio 5:4:6 . The ratio between th...

    Text Solution

    |

  10. In a college , the ratio of the number of boys to girls is 8:5 . If th...

    Text Solution

    |

  11. The sides of a triangle are in the ratio (1)/(2) : (1)/(3) : (1)/(4) a...

    Text Solution

    |

  12. In a school, 10% of boys are equal to the one-fourth of the girls. Wha...

    Text Solution

    |

  13. Three containers have their volumes in the ratio 3 : 4 : 5. They are f...

    Text Solution

    |

  14. If 10% of x = 20% of y, then x: y is equal to :

    Text Solution

    |

  15. The ratio of the incomes of A and B is 5:4 and the ratio of their expe...

    Text Solution

    |

  16. A and B are two alloys of gold and copper prepared by mixing metals in...

    Text Solution

    |

  17. Which of the following ratios is the greatest?

    Text Solution

    |

  18. A certain amount was divided between A and B in the ratio 4:3. If B's ...

    Text Solution

    |

  19. A sum of Rs. 63 is divided among A,B,C in such a way that A gets Rs. ...

    Text Solution

    |

  20. If 1/5 :1/x = 1/x : 1/(1.25) then the value of x is

    Text Solution

    |