Probability

Hong Kong

Stage 1 - Stage 3

The following table shows the frequency of the lengths jumped at a long jump competition. The class interval is a range of distances measured in centimeters.

Class Interval |
Frequency |
---|---|

$0-39$0−39 | $6$6 |

$40-79$40−79 | $9$9 |

$80-119$80−119 | $7$7 |

$120-159$120−159 | $8$8 |

$160-199$160−199 | $1$1 |

$200-239$200−239 | $2$2 |

Sum | $33$33 |

a

According to the table, what is the probability that someone jumped more than 119 cm?

b

What is the probability that someone's jump measured between 80 and 159cm (inclusive)?

Easy

Approx 2 minutes

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