Question 646776
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Hi,
7 cards, 4 with odd numbers
draw 1 w/o replacement and draw another 
P(one odd) = {{{4C1*3C1/7C2 = 12/21 = 4/7}}}  
OR 
4/7*3/6 + 3/7*4/6 = 12/42 + 12/42 = 24/42 = 4/7