Answer:
0.019 or 1.9%
Step-by-step explanation:
The probability that a randomly selected roll used by the manufacturer contains flaws is determined by the probability of a flawed cotton roll occurring (1% x 70%) added to the probability of a flawed nylon roll occurring (4% x 30%) .

The probability that a randomly selected roll contains flaws is 0.019 or 1.9%
1. Like terms 2. Terms that is a lot and I will finish in a bit
OK you must establish a relation of the two first quantities, it means 1/4 lime : 3/4 oil, then with 1 cup oil it will be x quantity of lime
1/4 cup lime____3/4 cup oil
x_________1 cup oil x = 1*1/4÷3/4 , x= 1/3 lime juice