A: If we consider the two extremes, p = 1 or p = 10, we see that p2 – 13p + 40 = 0 for p = 1, p = 2 and p = 5. The probability of l  0 is 1/(2 - 5) = 1/5. The answer is (B).
Answer the following multiple choice question with options (a), (b), (c), (d), (e) by reasoning step-by-step.
Q:If p^2 – 13p + 40 = l, and p is a positive integer between 1 and 10, inclusive, what is the probability that l < 0? Answer Choices: A)1/10 B)1/5 C)2/5 D)3/5 E)3/10