Question
If the average cost price of 12 identical tables decreases
by Rs. 6 after replacing one table with a new table that costs Rs. 120, what was the original cost price of the replaced table?Solution
ATQ;
Let the cost price of each table be Rs. 'x'.
So, cost price of 12 tables = Rs. 12x
ATQ:
(12x - x + 120) ÷ 12 = x - 6
Or, 11x + 120 = 12x - 72
Or, x = 192
So, the cost price of the table that was removed is Rs. 192.
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