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26.01.2020 •
Mathematics
Acompany produces three combinations of mixed vegetables that sell in 1-kg packages. italian style combines 0.4 kg of zucchini, 0.3 kg of broccoli, and 0.3 kg of carrots. french style combines 0.5 kg of broccoli and 0.5 kg of carrots. oriental style combines 0.2 kg of zucchini, 0.3 kg of broccoli, and 0.5 kg of carrots. the company has a stock of 17 comma 800 kg of zucchini, 28 comma 300 kg of broccoli, and 38 comma 900 kg of carrots. how many packages of each style should it prepare to use up existing supplies?
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Ответ:
Italian style = 18,000 packages
French style = 14,000 packages
Oriental style = 53,000 packages
Step-by-step explanation:
See the attached figure to represent the question
let the number of packages of Italian style = x
let the number of packages of French style = y
let the number of packages of Oriental style = z
By using the figure we can make the following equations:
0.4x + 0 * y + 0.2z = 17,800
0.3x + 0.5y + 0.3z = 28,300
0.3x + 0.5y + 0.5z = 38,900
Solving the 3 equations together to find x , y and z
Using the calculator:
x = 18,000 ⇒ Italian style packages
y = 14,000 ⇒ French style packages
z = 53,000 ⇒ Oriental style packages
Ответ:
0.0778
Step-by-step explanation:
Probability of false positive result, p =
= 0.008
Sample size, n = 15,000
mean, μ = np = 15000 × 0.008 = 120
Now,
Standard deviation, σ =![\sqrt{np(1-p)}](/tpl/images/0384/1536/53280.png)
or
=![\sqrt{15,000\times0.008(1-0.008)}](/tpl/images/0384/1536/55bd8.png)
= 10.91
Now,
Probability of there being more than 135 false-positive results
= P(X > 135) ≈![P(\frac{X-\mu}{\sigma}\frac{135-120}{10.91})](/tpl/images/0384/1536/b5c1b.png)
or
= P(z > 1.42)
or
= 1 - P(z ≤ 1.42)
= 1 - 0.9222 [P(z ≤ 1.42) = 0.9222 from standard z table]
= 0.0778
Hence,
P(X > 135) = 0.0778