Question

haw many arrangements can be made with the letters of the words "SERIES"?how many of these start and end with S​

Answer 1

Answer:

12

Step-by-step explanation:

So, the number of arrangements can be calculated as: Hence, 12 arrangements can be made begin and end with 'S'

Answer 2

STEP BY STEP SOLUTION:-

TOTAL ARRANGEMENT IS:-

$\frac{6</em></strong><strong><em>}{2 </em></strong><strong><em>\times 2</em></strong><strong><em>} \\ \\ = \frac{6 \times 5 \times 4 \times 3 \times 2}{2 \times 2} \\ \\ = 6 \times 5 \times 3 \times 2 \\ \\ = 180$

TOTAL ARRANGEMENT WHEN WORD START WITH S AND END WITH S IS

$\frac{5</em></strong><strong><em>}{2</em></strong><strong><em>} \\ \\ = \frac{5 \times 4 \times 3 \times 2}{2} \\ \\ = 5 \times 4 \times 3 \\ \\ = 60$

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