I'm posting one puzzle, riddle, math, or statistical problem a day. Try to answer each one and post your answers in the comments section. I'll post the answer the next day. Even if you have the same answer as someone else, feel free to put up your answer, too!
A drawer contains 4 blue socks, 6 gray socks, and 8 black socks. You randoml choose one sock, then another from the drawer. What is the probability that you choose 2 socks that match?
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(4/18 x 3/17) + (6/18 x 5/17) + (8/18 x 7/17)
ReplyDelete(12 + 30 + 56)/306
98/306
.3203...
~32% chance of choosing matching socks
Well my calculation are exactly the way Andy has done.
ReplyDeleteSo naturally I arrived at the same answer. :)
www.guessthelogo.blogspot.com
The probability better be 100% unless ur Blind.
ReplyDeleteHa! I love your answer JASDER6.
ReplyDeleteBut the answer (since we are picking randomly... or randoml since I didn't spell check as well as I should have) is what Andy and guessthelogo said.
Not bad odds, really.