2) 英文数学问题 请数学高手帮帮我解答 >< 不会这题 给十分 (不是要翻译 需要解答)

以下是我不会的英文数学问题 厉害的高手 请帮我解答一下问题 拜托了

4. For two random events C and D of a sample Ω P(C) = 0.25 , P(D) = 0.45 and P(C U D ) = 0.55 . Find :

a) P (C n D ) =
b) P D (C) =
c) PC (D) =

5. Carmela picks a card at random from a standard 52-card deck.

a) what is the probability that she draws a queen , given that the card is black ?
b) what is the probability that she draws a 5 , given that the card is less than 10 ?
c) what is the probability that she draws a spade , given that the card is red ?

6. A survey of 200 families living on a make believe island found that 92 of them owned a helicopter, 75 owned a hydroplane , and 23 owned both vehicles. What is the probability that a randomly selected families :

a) owns a hydroplane , given that it owns a helicopter ?
b) owns a helicopter , given that it owns a hydroplane ?

还是我,4题仍然看不懂符号

5、6可以做

5:52张牌里抽任意一张:如果是黑色的,那么黑牌一共26张,抽出Q的概率自然是2/26=1/13
如果此牌面小于10,那么一共是36张,抽出5的概率自然是4/36=1/9
如果此牌是红的,那么红牌一共是26张,那么抽出黑桃的概率自然是0

6: 在假想的岛上,200家庭中有92家有直升机,75家有水上飞机,23家是两样都有。那么只有直升机的就是92-23=69,只有水上机的是75-23=52,什么都没有的是200-23-69-52=56,然后就简单啦:
如果有家人有直升机,那么还有水上飞机的概率是:23/69
如果有家人有水上飞机,那么还有直升机的概率是:23/52

写错了,改:
如果有家人有直升机,那么还有水上飞机的概率是:23/92
如果有家人有水上飞机,那么还有直升机的概率是:23/75
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第1个回答  2012-05-10
这个就是高手也卟一定认识英文啊
第2个回答  2012-05-10
敢不敢翻译过来让哥帮你作了?
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