单项选择题
Nine pieces of paper numbered consecutively from 1 to 9 are put into a hat.If one piece of paper is drawn a trandom from the hat,what is the probability that it will have an even number()
A.A B.B C.C D.D E.E
A. if the quantity in Column A is greater; B. if the quantity in Column B is greater; C. if the two quantities are equal; D. if the relationship cannot be determined from the information given.
A. 54 B. 60 C. 66 D. 84 E. 90