Question

In a group, 150 students know Hindi and 60 know English and 10 know both Hindi and English. If there are 30 students who know neither of the two languages, how many students are there in the group?

Answer 1

there are 150+60+10+30,i.e. 250 students in the group.

Answer 2

Answer:

230

Step-by-step explanation:

n(h)= 150

n(e)= 60

n(h n e)= 10

n(hUe)'= 30

n(hUe)=?

n(U)= ?

n(hUe) = n(h)+n(e)- n(hne)

= 150+60-10

=200

n(U)= n( hUe)+ n(hUe)'

= 200 + 30

= 230