1. The average salary, per head, of all the workers of an institution is 60. The average salary of 12 officers is = 400; the average salary, per head, of the rest is 56. The total number of workers in the institution is
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By: anil on 05 May 2019 01.53 am
Let the total number of members in the institution be z average = $$frac{SumofElements}{NumberofElements}$$ Average salary of institution = Rs 60 total salary of Institution =Rs 60z Given that out of z persons , there are 12 officers and there average salary is = Rs 400 and so total salary of 12 officers = 12 x 400 =Rs 4800 So total salary of other (z-12) members =Rs ( 60z - 4800 )..............(1) It is given that average salary of (z-12) persons = Rs 56 and hence from here the total salary of (z-12) people = Rs 56(z-12)..........(2) Equation 1 and 2 are equal 60z - 4800 = 56z - 672 4z = 4128 z = 1032
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