Q97 / 160 · AP EAMCET 2020 (17 Sep Shift 2) · Mathematics
Letters of the word 'GOVIND' are permuted and arranged as in a dictionary, then the number of words that appear after the word 'GOVIND' is ____
- A519
- B510
- Correct answerC506
- D511
Solution
Word is 'GOVIND'
total words possible
\(=6 !=720 \text { words }\)
Now we find rank of word GOVIND,-
Number of words starting with
\(D=5\) ! \(=120\) words
Number of words starting with
G and second letter D

\(=24 \text { words }\) G and second Letter I
\(\mathrm{G}\) and second Letter \(\mathrm{N}\)
Now words with G and next letter \(\mathrm{O}\) and IIIrd Letter D
Now words with \(\mathrm{G}\) and next letter \(\mathrm{O}\) and third Letter I.
Similarly,
Now, we have,
and
And then
So, total words \(=\) rank \(=120+24 \times 3+6 \times 3+4=214\) th words So, Number of words after GOVIND \(=720-214=506\) Words

\(=24 \text { words }\) G and second Letter I

\(\mathrm{G}\) and second Letter \(\mathrm{N}\)

Now words with G and next letter \(\mathrm{O}\) and IIIrd Letter D

Now words with \(\mathrm{G}\) and next letter \(\mathrm{O}\) and third Letter I.

Similarly,

Now, we have,

and

And then

So, total words \(=\) rank \(=120+24 \times 3+6 \times 3+4=214\) th words So, Number of words after GOVIND \(=720-214=506\) Words
Hence, the correct answer is option: 'C'.