Let P = number of problems solved per day.
P = 448/28
P = 16
Lisa solved 16 problems per day.
Answer:

Step-by-step explanation:

Answer:
16/25
Step-by-step explanation:
We just have to find the probability that the 8 non-defects are chosen.
1. Chance first defect is undetected: 8/10 = <em>4/5</em>
2. Chance second defect is undetected: <em>4/5</em>
3. Total probability': 4/5 * 4/5 = 16/25
13.21 gallons are in 50 liters