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Math Help - Probility & Statistics TEST TOMMRROW HELP PLS!

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    Probility & Statistics TEST TOMMRROW HELP PLS!

    Hi can anyone help me understand the concept and tell me the process you have to do to get the answer. I already know the answer but i just dont get how it is.
    Question:A paper clip holder has 100 paper clips:30 red, 20 yellow, 25 green, 15 pink, and 10 black.Five clips are randomly drawn without replacement. What it the probability that all five clips are all black or all red?

    Answer:142,758/75,287,520=103/54,320=0.19%
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  2. #2
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    Quote Originally Posted by miemie11 View Post
    Hi can anyone help me understand the concept and tell me the process you have to do to get the answer. I already know the answer but i just dont get how it is.
    Question:A paper clip holder has 100 paper clips:30 red, 20 yellow, 25 green, 15 pink, and 10 black.Five clips are randomly drawn without replacement. What it the probability that all five clips are all black or all red?

    Answer:142,758/75,287,520=103/54,320=0.19%
    The calculation should also show you the process:


    Pr(All black) =  \left( \frac{10}{100} \right) \cdot \left( \frac{9}{99} \right) \cdot \left( \frac{8}{98} \right) \cdot  \left( \frac{7}{97} \right) \cdot \left( \frac{6}{96} \right) = ......


    Pr(All red) =  \left( \frac{30}{100} \right) \cdot \left( \frac{29}{99} \right) \cdot \left( \frac{28}{98} \right) \cdot  \left( \frac{27}{97} \right) \cdot \left( \frac{26}{96} \right) = ......

    Now add these two probabilities together ......
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