# Birthday paradox

How large is the group of people so that the probability that two people have a birthday on the same day of the year is greater than 90%?

## Correct answer:

Tips for related online calculators

Our percentage calculator will help you quickly calculate various typical tasks with percentages.

Do you want to convert time units like minutes to seconds?

Would you like to compute the count of combinations?

Do you want to convert time units like minutes to seconds?

Would you like to compute the count of combinations?

### You need to know the following knowledge to solve this word math problem:

### Units of physical quantities:

#### Themes, topics:

### Grade of the word problem:

## Related math problems and questions:

- Quadrilateral 82395

The points ABC lie on the circle k(S, r) such that the angle at B is obtuse. How large must the angle at vertex B of quadrilateral SCBA be so that this angle is three times greater than the interior angle ASC of the same quadrilateral? - Probability 64174

The banker deals, on average, with five clients a day. Find the probability that the number of clients (in one day) will be greater than 4. - Birthday 3043

Linda and her uncle Slavo have a birthday the same day. A few years ago, Linda was 13, and her uncle was 45 years old. How many years ago was it today that Uncle Slavo was three times older than Linda? - Sum on dice

We have two dice. What is the greater likelihood of falling a total sum of 7 or 8? (write 7, 8, or 0 if the probabilities are the same)?

- People 7331

How many people must be in a group for at least two of them to be born in the same month? - Twenty

Twenty swallows sit on a 10 m long telephone cable. Assume that swallows are completely randomly distributed along the line. (a) What is the probability that more than three swallows sit on a randomly selected section of cable 1 m long? (b) What is the pr - Probability 36081

There are 6 white and several red balls in the box. How many red balls must there be so that the probability of drawing a red ball is less than the probability of drawing a white ball or greater than the probability of drawing a white ball?