3 years ago

Please help me<3 Thank you so much!

Mathematics

1 answer:

arlik [135]3 years ago

7 0

Answer:

55%

Step-by-step explanation:

Divide the number of people that would buy the car again (this means that they were satisfied) by the total number of people

1320/2400 = 0.55

0.55 * 100 = 55%

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larisa86 [58]

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Ymorist [56]

A. 200

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3 years ago

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3 years ago

Determine the value of c that makes the function f(x y) = c/x-y/ a joint discrete probability density function for x=2,0,2 and y

UkoKoshka [18]

Given: The given function is

$f(x,y)=c(x-y)$

To find: Here we need to find the value of c for which f(x,y) will be a joint

discrete probability density function.

Solution:

Now, to find c we have,

$\int\limits^3_{-2} \,\int\limits^2_0 {f(x,y)} \, dx dy\\=\int\limits^3_{-2} \,\int\limits^2_0 {c(x-y)} \, dx dy\\\\=\int\limits^3_{-2} \,[2c-2cy]dy\\=10c-5c\\=5c\\The integral should be1.\\So, 5c=1\\$

∴ $c=\frac{1}{5}$

Therefore, the required value of c is 1/5.

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3 years ago