# Math

posted by .

What is the probability of in a room with 15 people, there will be at least one shared birthday?

• Math -

In a room of just 23 people there's a 50-50 chance of two people having the same birthday. In a room of 75 there's a 99.9% chance of two people matching. Put down the calculator and pitchfork, I don't speak heresy. The birthday paradox is strange, counter-intuitive, and completely true.

## Similar Questions

1. ### math

the smallest number of people in a room where the probability of two of them having the same birthday is at least 50 percent. Answer is between 1 and 31. This is a classic problem given in probability classes. There are plenty of sites …
2. ### math

the smallest number of people in a room where the probability of two of them having the same birthday is at least fifty percent Please post under one name. The smallest class where the chance of finding two people with the same birthday …
3. ### MATH, HELP

what is the probability that at least 2 students in a class of 36 have the same birthday?
4. ### Algebra

How many people must be in a room to be sure that at least 4 of them have the same birthday?
5. ### Probabability

You walk into a classroom containing 20 other people. What is the probability that at least one of the other people has the same birthday (month and day) as you?
6. ### math

Find the probability of at least one birthday match among a group of 48 people.
7. ### Math

What is the probability that at least 2 people in a random group of 4 people have a birthday on the same day of the week?
8. ### Math Probability

A math class has 20 students who choose a topic from a list for an essay. How big pool is necessary for the probability of at least one duplicate to drop below fifty percent?
9. ### Math - Data Management

What is the probability that there are at least two people with the same birthday in a class of 40 students?
10. ### Probability Help

Fourty people are selected at random. What is the probability that none of the people in this group have the same birthday?

More Similar Questions