Solution -
Let,
MP = x
After 20% discount,
SP = x × (80/100)
SP = x × 0.8
After another 10% discount,
SP = X × 0.8 × 0.9
468 = X × 0.8 × 0.9
468 = 0.72x
x = 468/0.72
x = 650
Therefore,
The MP is 650.
Hence,
The correct naswer is option (d) Rs. 650.
Thank You