Anonymous
Anonymous asked in Science & MathematicsMathematics · 9 years ago

Stats Question Concerning Probability?

I'm not sure how to solve this problem:

A hoard of medieval coins discovered in what is now Belgium included 20 struck in Antwerp and 16 struck in Brussels. If a person chooses five of these coins at random, what are the probabilities that she will get

a) two coins struck in Antwerp and three struck in Brussels

b) four coins struck in Antwerp and one coin struck in Brussels?

Thank you very much in advance!

2 Answers

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  • M3
    Lv 7
    9 years ago
    Favorite Answer

    safest to use combinations

    a. 20c2*16c3 /36c5 = .2822 <------

    b. 20c4*16c1/36c5 = .2056 <-------

  • 9 years ago

    a.)(2/20)*(3/16)

    b.) (4/20)*(1/16)

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