in a group of students half the number of student know Hindi, 2/3 of them know English, 10 know both the language and 6 students do not know either Hindi English. how many students are there in the group

Let there are x student in group. So total number of student x=x/2 +2x/3-10+6 x=7x/6 -4 7x/6-x=4 & x/6=4 & x=24