3 votes 3 votes In how many Ways can 5 numbers be selected and arranged in ascending order from set 1 2 3 4 5 6 7 8 9 10? Ans. Is it 10C5 * 1ways Please correct me if I m wrong.. Surya Dhanraj asked Oct 11, 2017 Surya Dhanraj 300 views answer comment Share Follow See all 3 Comments See all 3 3 Comments reply joshi_nitish commented Oct 11, 2017 reply Follow Share correct !! 0 votes 0 votes Surya Dhanraj commented Oct 11, 2017 reply Follow Share Thanku..:) 0 votes 0 votes Lakshman Bhaiya commented Oct 25, 2018 reply Follow Share $5$ numbers are selected and arranged in ascending order from set $1 ,2, 3, 4, 5, 6, 7, 8, 9, 10$ So,answer is $\binom{10}{5}\times 1$ [Because only one ascending order is possible] $5$ numbers are selected and arranged in descending order from set $1 ,2, 3, 4, 5, 6, 7, 8, 9, 10$ So,answer is $\binom{10}{5}\times 1$ [Because only one descending order is possible] $5$ numbers are selected and arranged in ascending (or) descending order from set $1 ,2, 3, 4, 5, 6, 7, 8, 9, 10$ So,answer is $\binom{10}{5}\times 1+\binom{10}{5}\times 1$ [Because two order(ascending or descending) is possible] $5$ numbers are selected and arranged in ascending and descending order from set $1 ,2, 3, 4, 5, 6, 7, 8, 9, 10$ So,answer is $\binom{10}{5}\times 0=0$ [Because two order(ascending and descending) is not possible at a time] 0 votes 0 votes Please log in or register to add a comment.