AdminKeymaster

November 25, 2018 at 11:58 am

Post count: 802

No of Customers |
Amount Spent |

100 |
$5 or more |

83 |
$5 or more |

75 |
$15 or more |

52 |
$20 or more |

31 |
$25 or more |

17 |
$30 or more |

8 |
$35 or more |

0 |
$40 or more |

Arthur runs a video game business called Space-Zone. One Saturday Arthur surveys the amount of money each customer spends at his Space-Zone store. How many customers spent less than $20?

a. 52

b. 48

c. 23

d. 21

this is quite a tricky question and needs to be read very carefully

there are 100 customers and we need to consider those people who spent more than $20 (have to do this one backwards)

52 people spent $20 or more (all those people that spent $25, $30 etc would also have spent $20 so we only need to count them once)

so out of 100 people, 52 spent $20 or more, this must mean 48 people spent less than $20

∴ B