Answer:
You can buy 17 oranges for rupee 24.
Explanation:
3 dozen = 3 x 12 = 39 oranges
54 ÷ 39 = 1.38461538462
1 orange = rupee 1.38
1.38461538462 x 17 = 23.5384615385
17 oranges = rupee 23.54
If you add the cost of 1 more orange it would cost more than rupee 24 so you can only buy 17 oranges for rupee 24.
Hope this helps :)