Number of permutations of 1 appearing somewhere to the left of 2 3 appearing to the left of 4 and 5 somewhere to the left of 6, is |
Number of permutations of 1 appearing somewhere to the left of 2 3 appearing to the left of 4 and 5 somewhere to the left of 6, is |
(9) Number of digits are 9 Select 2 places for the digit 1 and 2 in From the remaining 7 places select any two places for 3 and 4 in And from the remaining 5 places select any two for 5 and 6 in Now, the remaining 3 digits can be filled in
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