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MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXERCISE
- Evaluate the following : "^50C47.
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- Evaluate the following : "^15C14.
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- Evaluate the following : "^10C4+ ^10C5.
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- Evaluate the following : "^13C6+ ^13C5.
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- Evaluate the following : "^19C17+ ^19C18.
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- Evaluate the following : "^61C57- ^60C56.
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- Evaluate the following : "^25C22- ^24C21.
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- Evaluate the following : "^31C26- ^30C26.
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- Verify that : "^8C4+ ^8C3= ^9C4.
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- If "^nC8= ^nC2, find "^nC2.
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- If "^nC10= ^nC12, determine n and hence "^nC5.
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- If "^nC9= ^nC8, find ^nC17.
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- Verify that 2 C (7,4)= C(8,4).
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- Find n if "^nC2 = ^nC3.
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- Prove that 1 + ^3C1+ ^4C2= ^5C3.
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- Determine n if "^(2n)C3 : "^nC3 = 11 : 1
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- If "^(2n)C3 : ^nC2= 12: 1, find n .
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- If .^(n)C(r )r: ^(n)C(r+1)=1:2 and .^(n)C(r+1): ^(n)C(r+2)=2:3, find ...
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- If "^(n-1)Cr : ^nCr : ^(n+1)Cr= 6:9: 13, find n and r.
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- If m= "^nC2, prove that "^m C2 =3xx ^(n+1)C4.
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