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Permutations , combinations and binomial expansion — Statistics STD 11 Commerce — Question

Gujarat BoardEnglish MediumSTD 11 CommerceStatisticsPermutations , combinations and binomial expansion1 Mark
Question
Write the fundamental principle of counting for multiplication.
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Answer

If the first operation can be done in m ways and second operation can be done in $n$ Ways, then two operations together can be done in m x n ways. This rule is called the fundamental Principle of counting for multiplication.

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