Question

The average salary per head of all workers of
an institution is Rs. 80. The average salary per
head of 16 officers is Rs. 600. The average salary
per head of 16 officers is Rs. 600. The average
salary per head of the rest is Rs. 67. Then, the
total number of workers in the institution is
1. 656
2. 665
3. 655
4. 676
5. 666

Answer 1

Check this attachment :-)