Average Practice Test 4

Average salary of all the workers = Rs 60.
Total salary = 60x
Average salary of 12 officers = Rs 400
Total salary = 12 × 400 = Rs 4,800
Average salary of the rest of the workers (x - 12) = 56
Total salary = 56 (x - 12),
According to the statement,
4,800 + (x - 12) 56 = 60x
4,800 + 56x - 672 = 60 x
4,128 = 4 x
x = 1,032
Total number of workers = 1,032