The answer is (B) hope that helps
Answer:
Step-by-step explanation:
xy = 2y + xy = 0
Hence, 2y + xy = 0 ---------(1)
Differentiating equation (1) n times by Leibnitz theorem, gives:
2y(n) + xy(n) + ny(n - 1) = 0
Let x = 0: 2y(n) + ny(n - 1) = 0
2y(n) = -ny(n - 1)
∴ y(n) = -ny(n - 1)/2 for n ≥ 1
For n = 1: y = 0
For n = 2: y(1) = -y
For n = 3: -3y(2)/2
For n = 4: -2y(3)
The probability is 0.7011.
Z-scores are computed using the formula
z = (X - μ)/σ
The z-score for the lower limit is
z = (7.5 - 8)/0.3 = -1.67
The z-score for the upper limit is
z = (8.2 - 8)/0.3 = 0.67
Using a z-table (http://www.z-table.com) we see that the area to the left of the lower limit, less than that, is 0.0475. The area to the left of the upper limit, less than that, is 0.7486. To find the area between them we subtract:
0.7486 - 0.0475 = 0.7011
Answer:
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