The urn contains B blue balls and R red balls. Each trial consists of drawing one random ball from the urn and observing its color. Then the ball is placed back in the urn.
What is the probability that, after N trials, the number of red balls is K?
The problem is ambiguously worded. The "number of red balls" is a constant, R, so it is unlikely to ever coincide with K (irrespective of the value of N). What should be found here is
"the probability that, after N trials, the number of observations of red balls is K".
Summing Digits within Text
Back to basics 23 - Triangular matrix
Compute a dot product of two vectors x and y
Divisible by 5
Reverse a string
Performance - summation
A shooting competition
Probabilities - More brains than luck
Non trivial identities - flipping
Non trivial identities - summation
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Contact your local office