human
Mean of minimum of all possible K | Function to find the value of nCr.
Base Case.
Find nCr recursively.
Function to find the expected minimum values of all the subsets of size K.
Find the factorials that will be used later.
Find the factorials.
Total number of subsets.
Stores the sum of minimum over all possible subsets.
Iterate over all possible minimum.
Find the mean over all subsets.
Driver Code"
Solution in Python:
 Give me a code to mean of minimum of all possible K and the other steps required?
assistant
#Here is code to mean of minimum of all possible K and the other steps required.
 def nCr ( n , r , f ) :
	if ( n < r ) :
		return 0
	return f [ n ] / ( f [ r ] * f [ n - r ] )
def findMean ( N , X ) :
	f = [ 0 for i in range ( N + 1 ) ]
	f [ 0 ] = 1
	for i in range ( 1 , N + 1 , 1 ) :
		f [ i ] = f [ i - 1 ] * i
	total = nCr ( N , X , f )
	count = 0
	for i in range ( 1 , N + 1 , 1 ) :
		count += nCr ( N - i , X - 1 , f ) * i
	E_X = ( count ) / ( total )
	print ( " { 0 : . 9f } " . format ( E_X ) )
	return 0
if __name__ == ' _ _ main _ _ ' :
	N = 3
	X = 2
	findMean ( N , X )