An outgoing batch of students wants to gift a PA system worth Rs 4,200 to their school. If the teachers, offer to pay 50% more than the students and an external benefactor gives three times the teacher’s contribution, then how much should the teachers donate?
Correct Option is: C The ratio of the share students : teacher: benefactor=1:1.5 : 4.5
So the proportion to teacher’s share = 1.5/7
Hence, the teachers would donate 1.5/7×4200=Rs 900