If ""^(12)P(r)=1320, find r....

If `""^(12)P_(r)=1320`, find r.

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VGS PUBLICATION-BRILLIANT-MOST IMPORTANT QUESTIONS-PREMUTATIONS & COMBINATIONS (VERY SHORT ANSWER TYPE QUESTIONS)

If ""^(n)P(3)=1320, find n.
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If ""^(12)P(r)=1320, find r.
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If ""^(n)P(7)=42. ""^(n)P(5). find n.
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Find the the number of functions from a set A containing 5 elements in...
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Find the number of bijections from a set A containing 7 elements onto ...
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Find the number of different chains that can be prepared using 7 diffe...
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Find the number of ways of arranging the letters of the word. INDEPE...
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Find the number of ways of arranging the letters of the word. MATHEM...
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Find the number of ways of arranging the letters of the word. INTERM...
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Find the number of ways of arranging all the letters of the word ENG...
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Find the number of ways of arranging the letters of the word. PERMUT...
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Find the number of ways of arranging the letters of the word. COMBIN...
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If ""^(n)C(4)=210 then find n.
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If ""^(n)P(r)=5040 and ""^(n)C(r)=210, find n and r.
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If ""^(12)C((s+1))=""^(12)C((2s-5)), then find s.
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If ""^(12)C((s+1))=""^(12)C((2s-5)), then find s.
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If ""^(n)C(21)=""^(n)C(27)" find " ""^(49)C(n)
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If ""^(n)C(5)=""(n)C(6), then find 13(Cn).
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If ""^(9)C(3)+""^(9)C(5)=""^(10)C(r) then find r.
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Find the value of ""^(10)C(5)+2. ""^(10)C(4)+""^(10)C(3).
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