A pharmacy offers a $30 \%$ discount on the list price of all medications it sells. When purchasing a medication with a list price of $\mathrm{R} \$ 120.00$, how many reais will a person pay?
(a) 36
(b) 84
(c) 64
(d) More than 116
(e) 94
The correct option is (b).

Solution 1: The person will pay 120 reais minus the discount, which is 30% of 120, that is, $0.3 \times 120=36$ reais. Thus, the person pays $120-36=84$ reais.

Solution 2: Since the discount is 30%, the person will pay 70% of 120, that is, $0.7 \times 120=84$ reais.