Sam was trying to make a sum of ₹730 using minimum number of notes. He would use
Descending order of Indian currency denominations is ₹2000, ₹500, ₹100, ₹50, ₹20 and ₹10.
₹730 = ₹500 + ₹200 + ₹30.
That is, one ₹500 note, one ₹200 note and one ₹30 note constitute ₹730.