英语翻译4.For two random events C and D of a sample Ω P(C) = 0.2

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英语翻译
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)\x05P (C n D ) =
b)\x05P D (C) =
c)\x05PC (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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