3 years ago

Can someone please I’m very bad with with “x-10” etc

Mathematics

1 answer:

grigory [225]3 years ago

7 0

X is equal to 23

15/3 = 5

36/3 = 12

39/3 = 13 then add the 10 and you get 23

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maks197457 [2]

D=rt and we are told d=546 and r=1.3m/s so

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t=420 seconds so

420s(min/60s)=7 min

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3 years ago

The random variable K has a geometric distribution with mean 16. Which of the following is closest to the standard deviation of

sdas [7]

Answer: d. 15.49

Step-by-step explanation:

Given : The random variable K has a geometric distribution with mean 16.

Formula for Mean and standard deviation in geometric distribution:

$\mu=\dfrac{1}{p}$ (1)

$\sigma=\dfrac{\sqrt{1-p}}{p}$ (2), where p is the probability of success in each trial.

Since $\mu=16$ (Given)

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$\dfrac{1}{p}=16\\\Rightarrow\ p=\dfrac{1}{16}=0.0625$

Put value of p in (2),

$\sigma=\dfrac{\sqrt{1-0.0625}}{0.0625}=\dfrac{\sqrt{0.9375}}{0.0625}$

$=\dfrac{0.968245836552}{0.0625}$

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Hence, the standard deviation of random variable K is closest to 15.49.

Therefore , the correct answer is d. 15.49 .

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3 years ago

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3 years ago

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3 years ago

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Bezzdna [24]

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3 years ago

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