A box contains 3 red chips and 2 blue chips. If two chips are selected at random without replacement, what is the probability that the chips are different colors?
Choose the most appropriate option:
A) 1/2 B) 3/5 C) 7/12 D) 2/3 E) 7/10
Total selection ways: 5C2=5!/2!3!=10   Selecting one blue chip out of two: 2C1=2!/1!1!=2   Selecting one red chip out of four: 3C1=3!/2!1!=3   Thus, (2C1*3C1)/5C2=(2*3)/10=6/10=3/5=3/5
<result>B</result>
A box contains 3 red chips and 2 blue chips. If two chips are selected at random without replacement, what is the probability that the chips are different colors?