A student was getting the following four offers on the purchase of a book:

A student was getting the following four offers on the purchase of a book:
I – Two successive discounts of 20% and 20%
II – Two successive discounts of 25% and 15%
III – Two successive discounts of 30% and 10%
IV – Two successive discounts of 5% and 35%
Which scheme offers the most discount to the student?
एक विद्यार्थी  को  एक पुस्तक की खरीद पर निम्नलिखित चार ऑफर मिल रहें थे
I – 20% और 20% की दो क्रमिक छूट
II – 25% और 15% की दो क्रमिक छूट
III –  30% और 10% की दो क्रमिक छूट
IV –  5% और 35% दो क्रमिक छूट
कौन-सा ऑफर विद्यार्थी को सबसे अधिक छूट प्रदान करता है?