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Ivanshal [37]
3 years ago
8

I’m giving brainliest !!!

Mathematics
1 answer:
Soloha48 [4]3 years ago
8 0

Answer:

give it

Step-by-step explanation:

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Blood type AB is the rarest blood type, occurring in only 4% of the population in the United States. In Australia, only 1.5% of
Umnica [9.8K]

Answer:

a. X is a binomial random variable with n = 50 and p = 0.04

b. Y is a binomial random variable with n = 40 and p = 0.015

Step-by-step explanation:

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

X: the number of US residents (out of 50) with blood type AB.

Blood type AB is the rarest blood type, occurring in only 4% of the population in the United States

This means that p = 0.04, n = 50

Y: the number of Australians (out of 40) with blood type AB.

In Australia, only 1.5% of the population has blood type AB.

This means that p = 0.015, n = 40

Z: the total number of individuals (out of 90) with blood type AB.

Here

n = 90, p = 0.04*\frac{50}{90} + 0.015*\frac{40}{90} = 0.0289

Which of the following is true about the random variables X, Y, and Z?

Options a and b are true, while c is false.

7 0
3 years ago
NO LINKS OR ANSWERING QUESTIONS YOU DON'T KNOW!!!!
Over [174]

9514 1404 393

Answer:

  b.  -150

Step-by-step explanation:

We usually take elevation to be positive above sea level, and negative below sea level. If the elevation is below sea level, it is negative. If it is within 200 ft of sea level, the magnitude of the negative number is 200 or less. That is, the elevation must satisfy ...

  -200 ≤ elevation < 0

The only answer choice in that range is -150.

Ethan's elevation in feet could be -150.

5 0
3 years ago
How can u use a number line to find the sum of -4 and 6
sdas [7]

Find -4 on the number line.

Go to the right 6 place values (+6)

You will find your answer

-4 (+6) = 2

2 is your answer

hope this helps

5 0
3 years ago
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Which expression is equal to 7/12
Mandarinka [93]
7 divided by 12 is the answer. As 7 ÷ 12 becomes 7/12.
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3 years ago
Pls helppppppppppppppppppp
SSSSS [86.1K]

Answer:

i would nee dthe other persons walk too

Step-by-step explanation:

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