## Exam Style Question## Worked solutions to typical exam type questions that you can reveal gradually |

Question id: 29. This question is similar to one that appeared in an IB Standard paper in 2013. The use of a calculator is allowed.

Days | Frequency | Cumulative frequency |
---|---|---|

2 | 3 | 3 |

5 | 11 | 14 |

7 | 15 | 29 |

10 | \(x\) | 39 |

14 | 5 | 44 |

(a) Find the value of \(x\).

(b) Find the mean.

(c) Find the variance.

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