# Thread: Probility & Statistics TEST TOMMRROW HELP PLS!

1. ## 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?

2. Originally Posted by miemie11
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?

Pr(All black) = $\displaystyle \left( \frac{10}{100} \right) \cdot \left( \frac{9}{99} \right) \cdot \left( \frac{8}{98} \right) \cdot \left( \frac{7}{97} \right) \cdot \left( \frac{6}{96} \right) = ......$
Pr(All red) = $\displaystyle \left( \frac{30}{100} \right) \cdot \left( \frac{29}{99} \right) \cdot \left( \frac{28}{98} \right) \cdot \left( \frac{27}{97} \right) \cdot \left( \frac{26}{96} \right) = ......$