Question 2: An automatic lottery ticket dispenser is used to sell tickets priced at $2 each. The table below shows the likelihood that a random customer buys a certain number of tickets.

Number of tickets | Probability |

1 | 0.4 |

2 | 0.2 |

3 | 0.15 |

4 | 0.15 |

5 | 0.1 |

6 | 0.1 |

If X = the number of tickets purchased by a random customer, calculate the expected value of X.

- Khan Academy - Statistics

Interpreting Categorical and Quantitative Data.

- Khan Academy - Statistics

Making Inferences and Justifying Conclusions.

- Khan Academy - Statistics

Conditional Probability & the Rules of Probability.

- Free Test Online - Statistics

Using Probability to Make Decisions.

- Free Test Online - Statistics

Making Inferences and Justifying Conclusions.