Answer & ExplanationOption: [A]

The total age of first 25 girls is 25 x 13 = 325 year

The total age of second 25 girls is 25 x 16 = 400 year

The total age of first 50 girls = 725 year

The number of girls remained to calculate 30

So the total age of these 30 girls is (1070-725) year = 270 year

270/30 = 9 year

Advertisement

Government Schemes Mock Test | Start Test! |

Political Science Mock Test – 42 | Start Test |

History Test – 190 | Start Test |

Quantitative Aptitude Test | Start Test! |

Trigonometry - Mock Test | Start Test! |

Data Interpretation - Mock Test | Start Test! |

General Awareness - Mock Test | Start Test! |

Reasoning Ability - Mock Test | Start Test! |

Englist(Antonyms) Mock Test 1 | Start Test! |

Quantitative Aptitude (Percentage) Mock Test | Start Test! |

Economy Mock Test 1 | Unlock Test! |

Books & Authors - Test 2 | Unlock Test! |