In a group of students, 100 students know Hindi, 50 know English and 25 know both. Each of the students knows either Hindi or English. How many students are there in the group?


Let us assume U be the set of all students in the group


Let E be the set of students who know English


And, let H be the set of the students who know Hindi



Given that, number of students who know Hindi n (H) = 100


Number of students who knew English, n (E) = 50


Number of students who know both,


We have to find the total number of students in the group i.e. n (U)



= 100 + 50 – 25


= 125


Total number of students in the group = 125 students


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