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HIMALAYA PUBLICATION-PERMUTATION AND COMBINATIONS-Question Bank
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- The value of 1 .1 !+2 .2 !+3 .3 !+..+n .n ! is
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- Let A and B be two sets consisting of m and n elements respectively (n...
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- m parallel lines in a plane are intersected by a family of n parallel ...
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- All possible two factors products are formed from the numbers 1,2,3,4,...
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- The value of the expression : ""^(47)C4+sum(j=1)^5""^(52-j)C3 is eq...
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- sum(r=0)^(m)( n+r )C(n)=
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