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".
Remove all the words that end with "ain"
Roll the Dice!
02 - Vector Variables 4
Set x value to each even index of vector y.
Non trivial identities - flipping
Non trivial identities - differentiation
Remove collinear points in a set of 2D points defining a polygon
Non trivial identities - summation
Geometrical meaning of determinant
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