举一反三
- Referring to Table 6-2, for a given month, what is the probability that John's income as a waiter is between $700 and $1,600
- Referring to Table 5-1, the probability that both sound an alarm in the presence of smoke is ( ).(keep 2 decimal places)
- Referring to Table 5-1, the probability that neither sound an alarm in the presence of smoke is ________.
- Referring to Table 5-1, the probability that at least one sounds an alarm in the presence of smoke is ________.
- 分布1、分布2、分布3 的标准差分别为（ ）。回答下面的题目：假设三个损失分布如下表所示：分布1 分布2 分布3损失结果概率损失结果概率损失结果概率300 1/3 0 1/3 0 1/2400 1/3 600 1/3 600 1/3500 1/3 900 1/3 1200 1/6分布1、分布2、分布3 的期望损失分别为（ ）。 A: 100 (2 / 3) 、100 14 、200 5 B: 100 (2 / 3) 、100 (17 / 3) 、100 3 C: 100 3 、100 6、200 3 D: 100 6 、200 6 、200 3
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一.简答题（共1题,100.0分） 习题6-1: 1,2（1,3）3（1,3）. 习题6-2: 1（1）；2（（2）（4）（6）（8））；3（1）
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The following are the current month's balances for Toys Galore:What is the net income for Toys Galore for the current month? A: $10,000 B: $8,250 C: $11,750 D: $15,000
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The average daily consumption of Phosphorus by adults is 1,200 to 1,600 milligram.
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If two events are mutually exclusive and collectively exhaustive, what is the probability that both occur? A: 1 B: 0.5 C: 0 D: cannot be determined from the information given
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39号元素钇的核外电子排布式是下列排布中的（ ） A: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 2 4 p 6 4 d 1 5 s 2 B: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 2 4 p 6 5 s 2 5 p 1 C: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 2 4 p 6 4 d 2 5 s 1 D: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 2 4 p 6 5 s 2 5 p 1