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Compute (i) (7!)/(5!) (ii) (12 !)/((10 ...

Compute
(i) `(7!)/(5!)` (ii) `(12 !)/((10 !)(2!))`

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(i) `(7!)/(5!)` = `(7×6×5!)/(5!)` = 7×6 = 42
(ii) `(12 !)/((10 !)(2!))` = `(12×11×10!)/(10!×2×1)` = 6×11 = 66 ​ ​ ...
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