# TSI Math: Predicting Probabilities with a Trick Coin

Mercedes has a trick coin that's more likely to land on heads than on tails. She flipped the coin 1500 times, resulting in tails 450 times. What is the best estimate of the coin's probability of landing on heads?

Data Analysis, Statistics, and Probability | Probabilistic Reasoning |

Mathematics and Statistics Assessment | Probabilistic Reasoning |

Product Type | TSI |

TSI | Mathematics and Statistics Assessment TSI Math TSI Mathematics |

TSI Math | Data Analysis, Statistics, and Probability |

TSI Mathematics | Data Analysis, Statistics, and Probability |

Test Prep | TSI |

### Transcript

probability of an event from experimental data will need to

make a ratio The probability of an event happening is

the number of times the event occurred during the total

number of trials Well we want to know the probability

of flipping heads so let's start with the number of

times mercedes flipped heads Well she flipped tails four hundred

fifty times and she flipped heads one thousand fifty times

probability then is a thousand fifty over the fifteen hundred

of trials or point seven or seventy percent So yeah

pretty good odds to get ahead if she calls out

eds Yeah so that's it The answer is c or 00:00:53.029 --> [endTime] shmoop