A shopkeeper offers a scheme of either selling articles at successive discounts of 30% and 20% or one where a customer can “buy 2, get 1 free”. The positive difference in overall nominal percentage discounts offered in the two schemes is:
1
11\(\frac{2}{3}\)%
2
10\(\frac{1}{3}\)%
3
11\(\frac{1}{3}\)%
4
10\(\frac{2}{3}\)%