两个独立事件A和B发生的概率分别为<imgwidth="19"height="25"v:shapes="_x0000_i1029"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image010.png">和<imgwidth="20"height="25"v:shapes="_x0000_i1030"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image012.png">,则其中之一发生的概率为()
①
<imgwidth="49"height="25"v:shapes="_x0000_i1031"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image014.png">
②
<imgwidth="67"height="25"v:shapes="_x0000_i1032"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image016.png">
③
<imgwidth="67"height="25"v:shapes="_x0000_i1033"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image018.png">
④
<imgwidth="140"height="25"v:shapes="_x0000_i1034"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb06.files/image020.png">