The Human Eye and the Colourful World
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How do Organisms Reproduce?
Magnetic Effects of Electric Current
Heredity and Evolution
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Carbon and Its Compounds
Periodic Classification of Elements
Light – Reflection and Refraction
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Some Applications of Trigonometry
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Pair of Linear Equations in Two Variables
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Statistics

**Correct Marks**
1

**Incorrectly Marks**
0

Q 1. Consider the following distribution:

Marks obtained | Number of students |
---|---|

More than or equal to 0 | 63 |

More than or equal to 10 | 58 |

More than or equal to 20 | 55 |

More than or equal to 30 | 51 |

More than or equal to 40 | 48 |

More than or equal to 50 | 42 |

3

4

48

51

Class | Number of students | f |
---|---|---|

0-10 | 63-58=5 | 5 |

10-20 | 58-55=3 | 3 |

20-30 | 55-51=4 | 4 |

30-40 | 51-48=3 | 3 |

40-50 | 48-42=6 | 6 |

50-60 | 42-0=42 | 42 |

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