algebra
posted by Anonymous .
The U.S. Weather Service reports that in a certain northern city it rains 35 days and snows 40 days in the winter. However, it rains and snows on only 10 of those days. Based on this information, what is the probability that it will rain or snow in that city on a particular winter day? Assume that there are 90 days of winter.

P(A) + P(B)  P(A and B)
35/90 + 40/90 10/90 = 13/18
Respond to this Question
Similar Questions

math
at a mountain village in new guinea it rains on average 6 days a week. determine the probability that it rains on 1. any one day 2. two successive days 3. three sucessive days. what is the sample space/ 
math
at a mountain village in new guinea it rains on average 6 days a week. determine the probability that it rains on 1. any one day 2. two successive days 3. three sucessive days. what is the sample space/ 
math
In a mountain village it rains on average 5 days a week. Find the probability that over a weekend it rains on exactly one of the two days. 
algebra
The U.S. Weather Service reports that in a certain northern city it rains 35 days and snows 40 days in the winter. However, it rains and snows on only 10 of those days. Based on this information, what is the probability that it will … 
English
If it snows tomorrow, what will you do? 1. If it snows tomorrow, I will go out with my dog. 2. If it snows tomorrow, I will make a snow man at the back yard. 3. If it snows tomorrow, I will meet my girl friend. 4. If it snows tomorrow, 
Math
Ansgar is writing a novel. He writes seven days a week. On each of those days he write for at least 4 hours but never more than 8 hours. Last week, he wrote for exactly 46 hours. What is the maximum number of days on which he could … 
statistics
in a beach side suburb it rains on 20% of days and is windy on 30% of days. if rain and wind are independent, on any particular day find the probability that: (a) it rains and is windy (b) it does not rain and is not windy (c) it rains … 
statistic
in a beacside it rains on 20percent of days and is windy on 30percent a days.if rain and wind are independent on any particular days find the probability that it rains and it windy 
Math
Ansgar is writing a novel. He writes seven days a week. On each of those days he writes for at least 4 hours but never more than 8 hours. Last week, he wrote for exactly 46 hours. What is the maximum number of days on which he could … 
English
(1) It rains. (2) It is cold. (3) It is growing dark. (4) It seems that there is no end to this. (5) It is unclear why he cut the rope. (6) It snows a lot. (7) It is snowing a lot.  "Rains" and "snows" …