问题
单项选择题
If two fair coins are flipped and two fair six - sided dice are rolled, all at the same time, what is the probability of ending up with two heads (on the coins) and two sixes (on the dice)（）
A. 0.4167.
B. 0.0039.
C. 0.0069.
答案
参考答案：C
解析：
For the four independent events defined here, the probability of the specified outcome is 0.5000×0.5000×0.1667×0.1667 = 0.0069.