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Arte-miy333 [17]
3 years ago
8

A drawer contains 6 white socks and 10 black socks. If 2 socks are chosen at random, what is the probability that they will have

the same color? Please explain!!! I have the SHSAT Exam tomorrow and I need to know how to do this. Thanks.
Mathematics
2 answers:
baherus [9]3 years ago
7 0

there are 16 socks in the drawer

probablility of 2 white socks  or  2 black socks

6/16 *5/15  + 10/16*9/15   no replacement on socks

30/240 + 90/240

120/240

1/2

SpyIntel [72]3 years ago
3 0

|\Omega|=C(16,2)=\dfrac{16!}{2!14!}=\dfrac{15\cdot16}{2}=120\\|A|=C(6,2)+C(10,2)=\dfrac{6!}{2!4!}+\dfrac{10!}{2!8!}=\dfrac{5\cdot6}{2}+\dfrac{9\cdot10}{2}=15+45=60\\\\P(A)=\dfrac{60}{120}=\dfrac{1}{2}=50\%

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