Home
Class 11
ECONOMICS
The mean height of 20 girls in section A...

The mean height of 20 girls in section A of a class is 155 cm, and that of 30 girls in section B is 158 cm. Find the overall mean height of 50 girls.

Text Solution

Verified by Experts

The correct Answer is:
156.8 cm
Promotional Banner

Topper's Solved these Questions

  • ARITHMETIC MEAN

    SK AGGARWALA|Exercise Exercise (Long answer Question )|1 Videos

  • CENTRAL PROBLEMS OF AN ECONOMY

    SK AGGARWALA|Exercise SOME IMPORTANT|5 Videos

Similar Questions

Explore conceptually related problems

The mean height of 25 boys in a class is 150 cm , and the mean height of 35 girls in the same class is 145 cm . The combined mean height of 60 students in the class is "_______" (approximately).

The average height of 20 boys is 120 cm and the average height of 10 girls is 117 cm. Find the average height of these 30 students.

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

In a class of 88 students, the number of girls is 20% more than the number of boys. The average height of the boys is 164 cm and the average height of the girls is 4 cm less than the average height of all the boys and girls in the class. What is the average height (in cm) of all the students in the class ?

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.

SK AGGARWALA-ARITHMETIC MEAN-Exercise ( Numerical Exercises )
  1. Solve Q.1 by step deviation method.

    Text Solution

    |

  2. An opinion poll was conducted by interviewing 150 people. Calculate th...

    Text Solution

    |

  3. A survey of monthly incomes of 100 families living in a village was co...

    Text Solution

    |

  4. Calculate average cost of cultivation per quintal of wheat from the fo...

    Text Solution

    |

  5. Calculate (a) unweighted and (b) weighted mean price from the followi...

    Text Solution

    |

  6. Calculate the simple arithmetic mean of the pocket money of the 8 stud...

    Text Solution

    |

  7. Sachin Tendulkar scored the following runs in the World Cup Cricket 20...

    Text Solution

    |

  8. Per Capita income ( at 1993-94) of India during 1991-1992 to 2001-02 i...

    Text Solution

    |

  9. Given yield per hectare of food grains in India during 1995-96 and 200...

    Text Solution

    |

  10. Frequency distribution of cost of production per unit of a good is giv...

    Text Solution

    |

  11. Calculate (i) the unweighted mean of prices and (ii) the mean obtained...

    Text Solution

    |

  12. A student obtains the following percentage in an examination. (i...

    Text Solution

    |

  13. The mean height of 20 girls in section A of a class is 155 cm, and tha...

    Text Solution

    |

  14. Gross Enrolment Ratio (GER) in classes I-V for boys and girls in the 3...

    Text Solution

    |

  15. Percentage of households having access to safe drinking water in 31 St...

    Text Solution

    |

  16. Find the average mark from the following :

    Text Solution

    |

  17. Find the average cost of production ( in Rs per unit ) in factories i...

    Text Solution

    |

  18. Calculate the average daily earnings of emplyees.

    Text Solution

    |

  19. Caculate the average number of days of absence by students from school...

    Text Solution

    |

  20. Calculate average number of marks by student in a class. Note: I...

    Text Solution

    |