The average salary of all the 60 employees in an office is Rs. 12,000 per month. if the number of executives is twice the number of non executives employees, then the average salary of all the non executives employees is	Pick:
A) Rs. 9000	B) Rs. 8000	C) Rs. 6000	D) can't be determined	E) None
Answer   No. of executives / No. of non- executives   = 2 / 1   Therefore   Number of executives = 40   and number of non executives employees = 20   now , go through the options   Total salary = 40 x salary of executives + 20 x salary of non-executives   60 x 12000 = 40 x k + 20 x l, here k, l are unknowns   so we con't determine the required average salary   Correct Option: can't be determined
<result>D</result>
The average salary of all the 60 employees in an office is Rs. 12,000 per month. if the number of executives is twice the number of non executives employees, then the average salary of all the non executives employees is