0 votes 0 votes In a class of $80$ students, $40$ are girls and $40$ are boys. Also, exactly $50$ students wear glasses. Then the set of all possible numbers of boys without glasses is $\{0, \dots , 30\}$ $\{10, \dots , 30\}$ $\{0, \dots , 40\}$ none of these Combinatory isi2017-mma engineering-mathematics discrete-mathematics combinatory + – go_editor asked Sep 15, 2018 edited Nov 8, 2019 by go_editor go_editor 745 views answer comment Share Follow See 1 comment See all 1 1 comment reply Subarna Das commented May 11, 2019 reply Follow Share https://gateoverflow.in/209518/isi-2017-6 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes Let’s suppose all girls wear glasses.Then number of boys who wears glasses are 10. and all boys can wear glasses. so range is 10 to 40. pranabdbg14 answered Jul 3, 2021 pranabdbg14 comment Share Follow See 1 comment See all 1 1 comment reply KAUNIL commented Mar 15, 2023 reply Follow Share 40 can’t be in the set as it contradicts number of students in the class. 0 votes 0 votes Please log in or register to add a comment.