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请教GWD 数学题 中值和概率
Q2:
OnSaturday morning, Malachi will begin a camping vacation and he will return homeat the end of the first day on which it rains. If on the first three days of the vacation the probability of rain oneach day is 0.2, what is the probability that Malachi will return hme at theend of the day on the following Monday?
A. 0.008
B. 0.128
C. 0.488
D. 0.512
E. 0.640
Answer: B
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Q3:
Eachof the 45 boxes on shelf J weighs less than each of the 44 boxes on shelfK. What is the median weight of the 89boxes on these shelves?
(1) The heaviest box on shelf J weighs 15 pounds.
(2) The lightest box on shelf K weighs 20 pounds.
Answer: A-----------------------------------------------------------------------------------------------------------
概率和中数是我十足的弱项，请各位聪明的小朋友帮忙解释一下吧！ 感激.... |
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