IBPS Government Jobs Exams Numerical Ability Averages

In an office some persons are officers and some are non-officer. The number of officers is 30. The average salary of officers is Rs. 1040 and that of non-officers is Rs. 400. If the average salary of entire staff in office (officers + Non – officers) is Rs. 500 per month, then what is the average of total number of employees (officers + Non – officers) in the office?
A) 49 B) 89 C) 92 D) 96

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IBPS Other Question

A, B, C, and D are four friends. In which B and C are brothers. 360 sweets are divided among them. A gets 200/3 % of B. B gets 40% of C and C gets 75% of D. Then what is the difference between the number of sweets received by brothers and the number of sweets received by others?
A) 44 B) 34 C) 24 D) 14 Ashok purchased 100 books of quantitative aptitude for his book store. He sold 20% of total books at a profit of 10%, 37.5% of remaining at a profit of 15%, 80% of the remaining at a profit of 8% and remaining at a profit of 20%. If he sold all the books at a profit of 16% he would have gained Rs. 1505 more, then find the cost price of each book.
A) Rs. 250 B) Rs. 375 C) Rs. 350 D) Rs. 450