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Jennifer prend au hasard deux chaussettes parmi 24 qui ont été jetées pêle-mêle dans un tiroir ;8 sont blanches, 10 sont noires, 4 sont roses et 2 sont orange. Détermine la probabilité de tirer deux chaussettes blanches

Guest Apr 18, 2017
 #1
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Jennifer randomly takes two socks out of 24 that have been thrown together in a drawer. 8 are white, 10 are black, 4 are pink and 2 are orange. What is the probability of drawing two white socks?

Guest Apr 18, 2017
 #2
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P ( two white socks)  =

 

[ Number of ways to choose 2 white socks from 8] / [Number of ways to choose 2 socks from 24] =

 

C(8, 2)  / C(24, 2)  =

 

7/69  ≈  .1014   ≈  10.14 %

 

 

 

cool cool cool

CPhill  Apr 19, 2017
 #3
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8/24 x 7/23 =56/552 = 7/69 =10.14%

Guest Apr 19, 2017

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