1.

Consideer the following statements : I . Number of ways of placing 'n' objects in k bins (k le n) such that no bin is empty is ""^(n-1)C_(k-1). II. Number of ways of writing a positive integer 'n' into a sum of k positive integers is ""^(n-1)C_(k-1). III. Number of ways of placing 'n' objects in k bins such that atleast one bin is non- empty is ""^(n-1)C_(k-1). IV. ""^nC_k - ""^(n-1)C_k = ""^(n-1)C_(k-1) then which of the above statements are true ?

Answer»

All the FOUR STATEMENTS
III and IV only
All except III
All except I

ANSWER :C


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