Question

In a class there are 30 students.

21 students like Maths
16 students like English
6 students don't like Maths or English
How many students like both Maths and English?​

Answer 1

q. is wrong dear change it

Answer 2

n(M) + n(E) = n(N union E) + n(N intersection E) 21 + 16 = n(N union E) + 6 31 = n(N union E)