**Height (cm)** | **Number of children’s** |

below 140-145 | 5 |

below 145-150 | 13 |

below 150-155 | 25 |

below 155-160 | 41 |

below 160-165 | 52 |

below 165-170 | 57 |

below 170-175 | 60 |

Height of 30^{th} child = 155+\(\cfrac{5}{32}\)+4\(\cfrac{5}{16}\)

= 155\(\cfrac{5}{32}\)+\(\cfrac{40}{32}\)= 156\(\cfrac{13}{32}\)