mathenaiol there are 20mathematics and 4 teach both physics andmathema

1.	mathenaiol there are 20mathematics and 4 teach both physics andmathematics. How many teachers teach phys-In a schoolmathematics or physics, of theseare 20 teachers who teach12 teachics?
Answer» 20 teachers who teach math(M) ,or Physics(P) = n(M∪P) =20n(M)=12n(M∩P) =4n(P) = ? n(P) = n(M∪P)+n(M∩P)-n(M) =20+4-12=24-12=1212 teach physics

mathenaiol there are 20mathematics and 4 teach both physics andmathematics. How many teachers teach phys-In a schoolmathematics or physics, of theseare 20 teachers who teach12 teachics?

Answer»

20 teachers who teach math(M) ,or Physics(P) = n(M∪P) =20n(M)=12n(M∩P) =4n(P) = ?

n(P) = n(M∪P)+n(M∩P)-n(M)

=20+4-12=24-12=1212 teach physics