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.FortworandomeventsCandDofasampleΩP(C)=0.25,P(D)=0.45a...
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 ? 展开
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 ? 展开
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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
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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