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Compute: (I) 30 ! 28 ! - Mathematics

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Compute: 

(i)\[\frac{30!}{28!}\]

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Solution

\[ \frac{30!}{28!} = \frac{30 \times 29 \times 28!}{28!} \left[ \because n! = n(n - 1)! \right]\]
\[ = 30 \times 29\]
\[ = 870\]

Concept: Combination
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APPEARS IN

RD Sharma Class 11 Mathematics Textbook
Chapter 16 Permutations
Exercise 16.1 | Q 1.1 | Page 4

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