One and only one line contains both A and B (assuming, that A and B do not overlap)
3x + 2y = 12
(x, y) = (__, 0)
3x + (2 x 0) = 12
3x + 0 = 12
3x = 12
x = 4
(4, 0)
100/60 = x/36
Cross Multiply
3600 = 60x
x = 60
First place pays $60 when second place pays $36.
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Answer:
option (b) 0.0228
Step-by-step explanation:
Data provided in the question:
Sample size, n = 100
Sample mean, μ = $20
Standard deviation, s = $5
Confidence interval = between $19 and $21
Now,
Confidence interval = μ ± 
thus,
Upper limit of the Confidence interval = μ + 
or
$21 = $20 + 
or
z = 2
Now,
P(z = 2) = 0.02275 [From standard z vs p value table]
or
P(z = 2) ≈ 0.0228
Hence,
the correct answer is option (b) 0.0228