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".
Select every other element of a vector
Find state names that end with the letter A
Remove NaN ?
Output any real number that is neither positive nor negative
Rotate Matrix @180 degree
A shooting competition
Area of polygon
Find the diagonal of the square of side L
Geometrical meaning of determinant
Remove collinear points in a set of 2D points defining a polygon
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