0 votes 0 votes A student taking a History examination is directed to answer any seven of 10 essay questions. There is no concern about Order here, so the student can answer the examination in how many ways? 110 129 120 140 Combinatory go-mathematics-1 combinatory + – Bikram asked Aug 8, 2016 retagged Jun 27, 2017 by Arjun Bikram 245 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 2 votes 2 votes as order does not matter so we can use combination instead of permutation and no. of ways to answer is C(10,7) =120 cse23 answered Aug 29, 2016 selected Aug 29, 2016 by Arjun cse23 comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes Order doesn't matter, repetitions not allowed. So $_{7}^{10}\textrm{C} = _{3}^{10}\textrm{C} = 120$ JashanArora answered Dec 16, 2019 JashanArora comment Share Follow See all 0 reply Please log in or register to add a comment.