sudhagar wrote:
The answer is B.
x + y = 10
40x + 60y/ x+y = 52
40x + 60y = 520
400 - 40y + 60y = 520
20 y = 120
y = 6
to get average 56, y = 56 (pls refer to chets post)
Hence 8 - 6 = 2.
when she returns oranges, x+y will no longer be equal to 10.
x will remain 2, and y will be the new number of oranges.
If she returns 5 oranges, she will have 3 oranges and 2 apples. To check accuracy, you can cross check by checking the average price of 3 oranges and 2 apples, which should equal 52 cents.
((2*40)+(3*60))/2+3 = (80+180)/5 = 260/5 = 52.