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What is the probability that in a group of six people at least two were born in the same month?
For ease of answering, we will work under the assumption that the probability of someone being born within any given month is equal to that of any other month.
Allowing that assumption, we can look at that question a slightly different way and say "What is the probability that all people in a group of six would each be born in a different month?" The answer to that would be 12/12 * 11/12 * 10/12 * 9/12 * 8/12 * 7/12, which can also be expressed as (12! / 6!) / 126, and comes out to 665280 / 2985984, which equals 385 / 1728.
The probability of at least two being being born in the same month would then be:
1 - 385 / 1728
= 1343 / 1728
≈ 0.7772, or approximately 77.72%
What else can I help you with?
What is the probability that at least 2 people have the same birth month in a group of 8 people?
Birth months are not uniformly distributed across the year. However, if yo assume that they are, the probability is 0.9536 (approx).
What is the probability of a month in a year having 5 sundays?
It is a certainty. There will always be at least one month that will meet the requirement.
What is probability if 12 person born in different calendar month?
Rather a vague question. Are the people related? Obviously thousands of people are born in every month, so I guess you mean people who are connected in some way.
You randomly select a month of the year What is the probability that you select a month with 31 days in it?
There are 12 months to choose from There are 7 months with 31 days in them. The probability of choosing a 31-day month is 7/12.
What is the probability that a month will contain 28 days?
It is 1. Every month contains 28 days.
What is the probability that at least 2 people have the same birth month in a group of 8 people?
Birth months are not uniformly distributed across the year. However, if yo assume that they are, the probability is 0.9536 (approx).
What is the least number of people that should group together so that at least 2 of them were definitely born on the same month?
13 is the smallest number of people that will guarantee that at least two of them were born on the same month.
Out of 27 students selected for an interview what is the probability that at-least 3 of them have their date of birth in the same month?
The probability is 1.
How many people do you need to gather if you want at least to of them to have birthdays in the same month?
13, if you want to be sure. It's impossible for a group of 13 people not to have at least one pair that share a birth month, because there are only 12 months.If you'll settle for a lower probability, thechance that a group of 5 randomly chosen people will contain at least one pair born in the same month is about 3/5, and if you gather 6 people the chance that at least two of them will share a birth month is about 4/5. Those aren't exact probabilities both because the math doesn't work out that way and and because birthdays are not randomly distributed by month ... significantly fewer people are born in February than in August. An exact probability would need to take that into account, and it's frankly more research and math than I want to do unless I'm getting paid for it.
What is the probability of a month in a year having 5 sundays?
It is a certainty. There will always be at least one month that will meet the requirement.
Using the probability If 400 people walk through the door in a month what is your total expected profit?
Using probability If 400 people walk through the door in a month what is your total expected profit?
What month do people sleep the least?
June
What month are the least people born in?
February - because it's the shortest month!
What month is the month that less people are born in?
Probably February because it has the least days.
What is probability if 12 person born in different calendar month?
Rather a vague question. Are the people related? Obviously thousands of people are born in every month, so I guess you mean people who are connected in some way.
What is the probability that you were born in a month that begins with the letter J?
the probability is 3/12 or 1/4
You randomly select a month of the year What is the probability that you select a month with 31 days in it?
There are 12 months to choose from There are 7 months with 31 days in them. The probability of choosing a 31-day month is 7/12.
