(a) If n = n 1 + n 2 + n 3 show that (This represents the...
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(a) If n = n1 + n2 + n3 show that
(This represents the number of ways in which n objects may be divided into three groups containing respectively n1, n2 and n3 objects.)
(b) Expand the following expressions
Transcribed Image Text:
(2)(". n n n + Mz M n! n! n! nz!
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