Question 1182448
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The statement of the problem does not define what "in two tries" means -- leaving the problem open to different interpretations.<br>
I read the problem differently than the other tutor; my interpretation is that "in two tries" means you are selecting two of the 40 individual socks from the drawer, one after the other, without replacement.<br>
P(blue pair) = (2/40)(1/39) = 2/1560
P(black pair) = (10/40)(9/39) = 90/1560
P(blue pair or black pair) = 2/1560+90/1560 = 92/1560 = 23/390<br>
ANSWER: 23/390 or about 5.9%<br>