'There were 35 students in a hostel. If the number of the students is increased by 7,

"There were
35 students in a hostel. If the number of the students is increased by 7,
then the expenses of the mess increase by Rs 42 per day, while the average
expenditure per head diminishes by Rs 1. The original expenditure of the mess
per day was
(a) Rs
400 (b) Rs 420 (c) Rs 432 (d) Rs 442"

increased