Question

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?

Answer 1

n(H) = 100
n(E) = 50
n(H intersection E ) = 25

n(H U E ) = 100+50-25
= 125
Hence, number of people in group i.e. n(H U E ) =125

hope it helps