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Amy876

  • 2 years ago

Erica was out of town for a month, so she had her friend Sara check her mailbox. Each day, Sara would count how many different types of mail Erica received and then place the mail in a box inside Erica's apartment. The table below shows how many pieces of each type of mail Erica received during the month. Erica's Mail Received in a Month Type of Mail Number of Pieces Bills20 Cards6 Junk Mail24 Magazines8 Advertisements38 Wrong Address 4 According to the table, if Erica drew two pieces of mail randomly from the box, without replacement, what is the probability she would draw out

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  1. Amy876
    • 2 years ago
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    what is the probability she would draw out a wrong address

  2. DoomDude
    • 2 years ago
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    1/25 is the chance she will draw a wrong address, if she draws 4 times, that would be 1/25 times 4, that would equal 4/100

  3. DoomDude
    • 2 years ago
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    So if I am right, it would be 4/100 and that can be simplified to 1/25

  4. Amy876
    • 2 years ago
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    THats not one of the answers

  5. DoomDude
    • 2 years ago
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    oh, sorry then, It has been a while since I have done probability

  6. DoomDude
    • 2 years ago
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    let me go read up on it quick then get back here

  7. Amy876
    • 2 years ago
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    A 3/2475 B 3/2500 C 4/2475 D 1/625

  8. kevinkeegan
    • 2 years ago
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    (4/total)*(3/total-1)

  9. kevinkeegan
    • 2 years ago
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    1st time round prob= 4/total 2nd time, theres 1 less , so = 3/(total-1)

  10. Amy876
    • 2 years ago
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    I dont get it?

  11. DoomDude
    • 2 years ago
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    but wouldn't that equal 1/825?

  12. Amy876
    • 2 years ago
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    but thats not one of the answers

  13. DoomDude
    • 2 years ago
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    exactly

  14. DoomDude
    • 2 years ago
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    let me see....

  15. DoomDude
    • 2 years ago
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    let me try to get someone here that knows tis...

  16. Amy876
    • 2 years ago
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    its ok I have another question that i need help with too

  17. DoomDude
    • 2 years ago
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    post the one here while i try to get someone here

  18. ZhangYan
    • 2 years ago
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    it was C

  19. kevinkeegan
    • 2 years ago
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    working pls

  20. DoomDude
    • 2 years ago
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    could you explain it @ZhangYan

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