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Number of permutations of  and 9 taken all at a time are such that the digit

1 appearing somewhere to the left of 2

3 appearing to the left of 4 and

5 somewhere to the left of 6, is  then the value of  is



Question ID - 153663 | SaraNextGen Top Answer

Number of permutations of  and 9 taken all at a time are such that the digit

1 appearing somewhere to the left of 2

3 appearing to the left of 4 and

5 somewhere to the left of 6, is  then the value of  is

1 Answer
127 votes
Answer Key / Explanation : (9) -

(9)

Number of digits are 9

Select 2 places for the digit 1 and 2 in  ways

From the remaining 7 places select any two places for 3 and 4 in  ways

And from the remaining 5 places select any two for 5 and 6 in  ways

Now, the remaining 3 digits can be filled in  Ways

Total ways

127 votes


127