#### Question

The number of Science and Mathematics projects submitted by Model high school, Nandpur in last 20 years at the state level science exibition is:

2 3 4 1 2 3 1 5 4 2 3 1 3 5 4 3 2 2 3 2. Prepare a frequency table and find the mean of the data.

#### Solution

The frequency table of the data is follows:

Number of projects (`x_i`) | Frequency (`f_i`) | `f_ix_i` |

1 | 3 | 1 x 3 = 3 |

2 | 6 | 2 x 6 = 12 |

3 | 6 | 3 x 6 = 18 |

4 | 3 | 4 x 3 = 12 |

5 | 2 | 5 x 2 = 10 |

N = 20 | `sum f_ix_i` = 55 |

Since, mean of the data = `(sum f_ix_i)/"N"`=5520=2.75

Hence, the mean of the data is 2.75.

Is there an error in this question or solution?

Solution The number of Science and Mathematics projects submitted by Model high school, Nandpur in last 20 years at the state level science exibition is: Concept: Concept of Arithmetic Mean.