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What is the probability of tomorrow being a Sunday?
There are 7 days in a week. One of those is Sunday. Therefore the probability at any given time that tomorrow will be Sunday is 1/7.
What is the probability that your birthday will fall on Saturday or Sunday?
2/7, as there 7 days in a week.
What is the probability of a month of august having 5 mondays?
The simplistic answer is that August will have five Mondays if the month starts on a Saturday, Sunday or Monday. Three days out of the seven so the probability is 3/7 = 0.4286. However, that assumes that any day of the week is equally likely and that is not the case. The impact of leap years and their 2800-year cycle is to increase the probability to 0.43
What is the probability of a month of January having 5 Sundays?
If a 31-day month starts on a Friday, Saturday or Sunday it will have 5 Sundays; if not it will have 4. So the probability is 3/7.
What is the probability that a person chosen at random was born on a Saturday or Sunday?
2:7 edit: That makes the assumption that: -birth isn't induced for various reasons - people tend to try for induced births more on weekends so that it doesn't interfere with the work week -the ratio of people born on any given day of the week is 1:1:1:1:1:1:1
