Based on weather data collected in Racine, Wisconsin, on Christmas Day, the weather had the following distribution: Event Relative Frequency Clear & dry 0.20 Cloudy & dry 0.30 Rain 0.40 Snow 0.10 Based on the data, what is the probability that next Christmas will be rainy or cloudy and dry? 单项选择题

A

0.60

B

0.70

C

0.50

D

0.45

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位置4的问题 Please match the items on the left with the appropriate equation on the right. Note that not all items on the right will be used. 提示1The probability of A提示1The probability of A的答案[input]提示2This gives the range of values of a discrete distribution and the associated probabilities提示2This gives the range of values of a discrete distribution and the associated probabilities的答案[input]提示3The probability of A union B提示3The probability of A union B的答案[input]提示4This summarizes the relationship between two variables提示4This summarizes the relationship between two variables的答案[input]可能的答案Contingency TableProbability VortexP(A U B)Probability Mass FunctionP(A and B)P(A)

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