Prove that the total number of selection...

Prove that the total number of selections that can be made out of the letters daddy did a deadly deed ids 1919 .

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CHHAYA PUBLICATION-PERMUTATION AND COMBINATION -EXERCISE 7B ( Short Answer Type Questions )

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If 20 straight lines be drawn in a plane , no two of them being parall...
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If 10 parallel lines in a plane are intersected by a family of anothe...
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Eight questions are given , each question has an alternative Prove tha...
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If the ratio of the total number of combinations of 2n different thing...
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In how many ways can one or more fruits be selected from 4 apples ,5 o...
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Let t(n) denote the number of diagonals of a polygon of n sides . If ...
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Let T(n) denote the number of triangles which can be formed using the...
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