3. The average salary per head of the entire
staff of an officer including the officers and
the clerks is Rs. 60. The average salary per
head of the officers is Rs. 400 and that of
the clerks is Rs. 56. If the number of officers
is 12, find the number of clerks in the office.
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Answer:
Let the number of passed clerks be x
Total salary for clerks = Rs.56x
Total salary of officers Rs.12×400 = Rs.
4800
Total salary of the staff of office
(Number of officers + Number of clerks)×90
x+=(12+x)×90
=1080+90x
6x=4800−1080=3720
x=620
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