(d) Rs. 2000
The average salary of the teachers
of a school was Rs. 3000. After the
appointment of two teachers, the
total salary increased by Rs. 4000
and the average salary decreased
by Rs. 100, then find the present
number of teachers. [NET, 1993]
(a) 20
(c) 30
(b) 18
(d)52
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