1.

Suppose there are 6 pairs of different colored balls and 4 balls are selected. If same colored ball is different andA denote the number of ways when no pair of same colored ball is selected,B denote the number of ways exactly one pair of same colored ball is selected,C denote the number of ways at least one pair of same colored ball is selected,then

Answer»

Suppose there are 6 pairs of different colored balls and 4 balls are selected. If same colored ball is different and

A denote the number of ways when no pair of same colored ball is selected,

B denote the number of ways exactly one pair of same colored ball is selected,

C denote the number of ways at least one pair of same colored ball is selected,

then



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