CP of 1 orange = 20/6 = Rs. 10/3
Now SP of 1 orange with 23% profit = (10/3)*(123/100) = Rs. 41/10
.'. Number of oranges to be sold in Rs. 820 = 820/(41/10) = 200
There is something I don't understand about algebra: It has been around for thousands of years, yet no one has ever found out what the value of "x" or "y" really is.
Richard van der Merwe
mathematics is the indispensible instrument of all physical research