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Evaluate : (i) 2 xx 6! - 3 xx 5! (ii...

Evaluate :
(i) `2 xx 6! - 3 xx 5!`
(ii) `(8!)/(4!)` (iii) `(20!)/(18!(20 - 18)!)`

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The correct Answer is:
(i) 1080, (ii) 1680, (iii) 190
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KUMAR PRAKASHAN-PERMUTATIONS AND COMBINATIONS-PRACTICE WORK
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  2. How many number between 99 and 1000 are there if (i) Last digit is 0 ?...

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  3. Evaluate : (i) 2 xx 6! - 3 xx 5! (ii) (8!)/(4!) (iii) (20!)/(18!(2...

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  4. IF (n + 2)! = 2550 n! find n.

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  7. Evaluate : ""((12!)-(10!)) / (9!)

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  16. If ""nPr=840 and ""^nCr=35, then r is equal to....

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