Question

Asked Oct 4, 2019

store gathers some demographic information from their customers. The following chart summarizes the age-related information they collected:

Age | Number of Customers |
---|---|

<20<20 | 97 |

20-30 | 64 |

30-40 | 55 |

40-50 | 91 |

50-60 | 88 |

≥60≥60 | 93 |

One customer is chosen at random for a prize giveaway.

What is the probability that the customer is at least 20 but no older than 50?

What is the probability that the customer is either older than 50 or younger than 20?

What is the probability that the customer is at least 50?

Enter your answers as either decimals or fractions, *not* as percents.

Step 1

The probability that the customer is at least 20 but no older than 50 is ** 0.4303** and it is obtained below:

The age class classes for at least 20 but no older than 50 are 20-30, 30-40 and 40-50.

Step 2

The probability that the customer is either older than 50 or younger than 20 is **0.5697** and it is calculated below:

The age class c...

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