Correct Option (3)
Let the total bus fare for two persons be denoted by F. Given that ₹ 10 represents 80% of the total fare, the calculation is as follows: 0.80×F=10 F=0.8010=8100=12.50 Thus, the total bus fare for two persons is ₹ 12.50. Initially, A possesses ₹ 10. B then contributes ₹ 3 to A. The total money A now has is ₹ 10 + ₹ 3 = ₹ 13. After purchasing two tickets for ₹ 12.50, the money remaining with A will be ₹ 13 - ₹ 12.50 = ₹ 0.50. ₹ 0.50 is equivalent to 50 paise. Therefore, A will be left with 50 paise.
Incorrect Options:
Option 1 is incorrect because A has ₹ 13, which is more than the ₹ 12.50 required for two tickets, indicating a surplus, not just enough.
Option 2 is incorrect because A possesses ₹ 13, while the fare is ₹ 12.50. A has a surplus of ₹ 0.50, not a deficit of ₹ 2.
Option 4 is incorrect because A's total money of ₹ 13 is sufficient to buy two tickets, which cost ₹ 12.50, leaving a remainder.