There are a total of 78 B-schools that place their students
∴ No. of B-schools which are reputed and place their students =
×78=13 Let No. of B-schools that are recognised = x
∴ No. of recognised B-schools that place their students =
x ∴No. of recognised B-schools that do not place their students =
∴
=39⇒x=52 Out of 13 reputed B-schools, 6 are recognised too
∴ Number of B-schools that are either recognised and place their students or reputed and place their students
=13+13−6=20 ∴ Number of B-school that are neither reputed nor recognised but place their students
=78−20=58 .