单项选择题

The 4 beads in a bag are identical except that 2 are red and 2 are blue．If 2 beads are to be simultaneously and randomly selected，what is the probability that they will both be blue（）

A.A
B.B
C.C
D.D
E.E

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单项选择题

The figure above shows a rectangular play area in which one child stands at B while another child runs back and forth along the entire side AD．If the running child is in a position randomly located along side AD at a given time，what is the probability that the two children are at most 50 feet apart at that time（）

A.A
B.B
C.C
D.D
E.E

单项选择题

The probability that event R will occur is 0.38．（）

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.