# Problems

1 – 30 of 30
 Problem Title Likes Solvers Difficulty

#### Problem 2770. Probability of Choosing a Red Ball

Created by: Kevin

1

53

#### Problem 1268. Penny flipping - calculate winning probability (easy)

Created by: Jeremy

4

167

#### Problem 44254. Probability of red tulips (at both ends of a row)

Created by: Noriko Hounoki

2

51

#### Problem 648. Cumulative probability of finding an unlikely combination

Created by: Doug Hull

Tags ml101

2

31

#### Problem 44277. Given n, create n random numbers such that their standard deviation is also n.

Created by: AMITAVA BISWAS

3

59

#### Problem 3056. Chess probability

Created by: Jean-Marie Sainthillier

Tags chess, elo

5

193

#### Problem 2591. Does the coin touch the line?

Created by: Georges

3

32

#### Problem 42485. Eliminate Outliers Using Interquartile Range

Created by: Monica Roberts

Tags outlier

2

21

#### Problem 1267. Calculate the probability that at least two people in a group share the same birthday.

Created by: Jeremy

4

76

#### Problem 42503. Generating random matrix with given probability mass function

Created by: Peng Liu

2

24

Created by: Omer

2

21

#### Problem 1287. Unique dice configurations

Created by: James

2

27

#### Problem 1159. Coin Tossing: Probability of Same Heads for N tosses

Created by: Richard Zapor

1

42

#### Problem 42670. If you prick us, do we not bleed?

Created by: James

0

20

Created by: Ken

Tags math

4

45

#### Problem 226. What are the odds?

Created by: Matt Fig

2

25

#### Problem 1272. The almost-birthday problem.

Created by: Claudio Gelmi

1

21

#### Problem 43575. Probabilities - More brains than luck

Created by: Massimo Zanetti

1

14

#### Problem 597. The Birthday Phenomenon

Created by: Ben Ausdenmoore

3

107

#### Problem 44451. Rate of event occurence: find percentiles of the distribution (for smallish rates)

Created by: David Verrelli

2

10

#### Problem 44676. Mean = Standard Deviation

Created by: Mehmet OZC

4

7

#### Problem 44779. Don't be mean. Be nice!

Created by: James

Tags mean, nchoosek

2

24

Created by: Erin

5

58

#### Problem 44630. Guess the number I'm thinking of (Part 1)

Created by: David Verrelli

12

37

#### Problem 1959. German tank problem

Created by: Alfonso Nieto-Castanon

4

24

#### Problem 331. Compute Area from Fixed Sum Cumulative Probability

Created by: Roger Stafford

1

6

#### Problem 42676. Histogram of histogram

Created by: Peng Liu

1

12

#### Problem 2995. Test Driven Solution - Probability Problem 1

Created by: Jonathan

1

13

#### Problem 3006. Test Driven Solution - Probability Problem 2

Created by: Jonathan

1

11

#### Problem 3009. Test Driven Solution - Probability Problem 3

Created by: Jonathan

2

9

1 – 30 of 30