Rama Shrestha
Learner
Math
The average salary of all the staff in a school is Rs. 20,000. The average salary of 10 lab assistants is Rs. 25,000 and the average salary of all the remaining staff is Rs. 15,000. Find the total number of staff in the school? Explain it.
(a)30 (b)35 (c)15 (d)20
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