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Let us assume that distributed amount = x rs.
Among no.of students = y
Let after distributing x rs. Among y students each student will get = x/y = z rs.
Therefore x/y = z
=> x = yz consider it as equation -- 1
It is given that if 10 students were more each student would get 2 rs. Less
=> x/(y+10) = z -2
=> x = (z-2)(y+10)
=> x = yz-2y+10z-20
From equation 1 yz = x
=> x = x-2y+10z-20
Both sides x will get cancelled
Therefore 10z -2y = 20 equation--2
Given if 15 students were less each student would get 6 rs. More
=> x/(y-15) = (z + 6)
=> x = (z+6)(y-15)
X = zy + 6y -15z -90
From equation--1
X = x + 6y -15z -90
6y -15z = 90 equation--3
On solving 2 and 3 equations we get
z = 10 and y = 40
X = yz = 10*40 = 400
Therefore among 40 students 400 rs. Weredistributed.
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