The average salary of all workers in the factory is Rs.60. The average of salary of 12 officers is Rs.400. The average salary of rest is Rs.56. Find the total no of workers in the factory.
A. 1116
B. 1032
C. 1212
D. 1132
ANS: B
EXPLANATION:
12×400+X×56 = (12+X)×60
4800+56X = 720+60X
4X = 4080
X = 1020
Total no of workers = 12+X=12+1020=1032
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