An outgoing batch of students wants to gift PA system worth Rs. 4200 to their school. If the teachers offer to pay 50% more than the students, and an external benefactor gives three times teachers’ contribution, how much should the teachers donate?
Explanation:
The ratios of the share of students, teachers and benefactor is 1 : 1.5 : 4.5.
So, the proportion of teachers share is 1.5/7.
So teachers would donate: (1.5 × 4200)/7 = Rs. 900
Hence, option (c).
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