an experiment with events A,B and C for which P(A)=0.23,P(B)=0.40,P(C)=0.85, also,suppose that A and B are mutually exclusive and B and C are independent. then
P(A or B)=P(A)+P(B)=0.23+0.4=0.63 (since A and B are mutually exclusive)
P(B or C)=P(B)+P(C)-P(B)P(C)=0.4+0.85-(0.40)(0.85)=0.91 (by independence)
我不明白 independence 和 mutually exclusive 有什么区别， P(B)+P(C)>1 很显然它们不是互相独立的啊 这里的 independence究竟是什么意思呢？我以为mutually exclusive和independence是一个意思，难道不是吗？
如果按照上面的两个式子 那就是说 mutually exclusive 是指它们没有交集，而independence表明它们有交集，是吗？
请NN帮忙解释一下了～～
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