4 years ago

Why are the soulution to the proportions 50/x = 10/20 and 10/50= 20/x

Mathematics

1 answer:

Marianna [84]4 years ago

4 0

Answer:

Step-by-step explanation:

You should croos multiply to get 10x = 50 (20) which is 10x = 1000 then divide each side by 10. What do you get for x?

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Assuming that X is a binomial random variable with n = 10 and p = 0.25, find the probability, P for each of the following values

seropon [69]

Answer: a) 0.0584

b) 0.2816

c) 0.1877

d) 0.1877117

Step-by-step explanation:

The binomial probability formula :-

$P(x)=^nC_xp^x(1-p)^{n-x}$ , where P(x) is the probability of getting success in x trials, n is total number of trials and p is probability of getting success in each trial.

Given : X is a binomial random variable with parameters :-

n = 10 and p = 0.25

$\text{a) P(x=5)}= ^{10}C_{5}(0.25)^5(0.75)^5\\\\=252(0.25)^5(0.75)^5\approx0.0584$

$\text{b) P(x=2)}= ^{10}C_{2}(0.25)^2(0.75)^8\\\\=45(0.25)^2(0.75)^8\approx0.2816$

$\text{c) P(x=1)}= ^{10}C_{1}(0.25)^1(0.75)^9\\\\=(10)(0.25)^1(0.75)^9\approx0.1877$

$\text{d) P(x=9)}= ^{10}C_{9}(0.25)^1(0.75)^9\\\\=(10)0.25)^1(0.75)^9\approx0.1877117$

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3 years ago

Which is bigger 500 ft or 40 ft?

Sav [38]

Answer: 500 ft is bigger

Step-by-step explanation:

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3 years ago

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Find the surface area of each prism or pyramid. Round to the nearest tenth if necessary. Can someone help me with 17-19 for 30 p

Orlov [11]

17) 388 in^2
18) 585 in^2
19) 960 ft^2
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HELPPPP!!!! The Super Fencing Company builds cedar fences for homes at a cost of

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Step-by-step explanation:

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3 years ago

Which of the following is equal to the rational expression below when x=11?

topjm [15]

Our first expression is equal to zero:
$\frac{x^2-121}{x+11}= \frac{11^2-121}{11+11} = \frac{121-121}{22}=0$
So we simply find the expression that is equal to zero.
The final answer is a.
$x-11=11-11=0$

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3 years ago