SOLUTION: a book seller buys 120 volumes of a certain series of books. he sells some at the published price of Rs. 18 each & disposes of the remainder during a cleaning sale at Rs. 12 each.
Question 917307: a book seller buys 120 volumes of a certain series of books. he sells some at the published price of Rs. 18 each & disposes of the remainder during a cleaning sale at Rs. 12 each. if his total recipts are Rs. 1920. find how many volumes were sold at each price.please help me Answer by KMST(5328) (Show Source):
You can put this solution on YOUR website! DEFINING A VARIABLE TO START: = number of books sold at Rs. 18 each, which makes = number of books sold at Rs. 12 each.
REASONING:
So, = money (in Rs.) received from the sale of books at Rs. 18 each; = money (in Rs.) received from the sale of books at Rs. 12 each,
and = total receipts (in Rs.).
The equation to solve is
SOLVING THE EQUATION: volumes were sold at Rs. 18 each,
and the remaining volumes were sold at Rs. 12 each.
