The following table shows marks obtained by 40 students in a Mathematics quiz competition

Monthly Income | Number of Workers |

0 - 20 | 3 |

20 - 40 | 6 |

40 - 60 | 12 |

60 - 80 | 14 |

80 - 100 | 5 |

Answer the following questions :

(i) Number of students who obtained marks in the groups 40 – 60.

(ii) This marks group having maximum number of students ?

(iii) Number of students who obtained more than 60 marks.