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Find the number of ways of arranging 15 ...

Find the number of ways of arranging 15 students `A_(1),A_(2),…….,A_(15)` in a row such that
neither `A_(2)` nor `A_(3)` be seated before `A_(1)`

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The correct Answer is:
`=2xx(lfloor15)/(lfloor3)`
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-ADDITIONAL SOLVED EXAMPLES
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  8. In how many ways 20 different coloured flowers can be arranged into a ...

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  10. Find the number of arrangements by arranging all the letters of the wo...

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  11. Find the number of ways of arranging the letters of the word 'BRINGING...

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  15. Find the number of ways in which 3 numbers in A.P. can be selected fro...

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  18. How many 4 letter words can be formed using the letters of the word 'P...

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