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3 years ago

Please help asappppppp

Mathematics

1 answer:

harkovskaia [24]3 years ago

7 0

Answer:

400 is the answer

Step-by-step explanation:

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The probability of being a universal donor is 6% (O-negative-blood type). Suppose that 6 people come to a blood drive.' a) What

Tcecarenko [31]

Answer:

$Mean = 0.36$

$SD = 0.5817$

$P(x=3) = 0.003588$

Step-by-step explanation:

Given

Let

A = Event of being a universal donor.

So:

$P(A) = 0.06$

$n = 6$

Solving (a): Mean and Standard deviation.

The mean is:

$Mean = np$

$Mean = 6 * 0.06$

$Mean = 0.36$

The standard deviation is:

$SD = \sqrt{np(1-p)}$

$SD = \sqrt{6*0.06*(1-0.06)}$

$SD = \sqrt{0.3384}$

$SD = 0.5817$

Solving (b): P(x = 3)

The event is a binomial event an dthe probability is calculated as:

$P(x) = ^nC_x * p^x * (1-p)^{n-x}$

So, we have:

$P(x=3) = ^6C_3 * 0.06^3 * (1-0.06)^{6-3}$

$P(x=3) = ^6C_3 * 0.06^3 * (1-0.06)^3$

$P(x=3) = 20 * 0.06^3 * (1-0.06)^3$

$P(x=3) = 0.003588$

7 0

3 years ago

A walkway forms one diagonal of a square playground. The walkway is 22 m long. How long is a side of the playground?

nadya68 [22]

You can think of a square as two isosceles right angle triangles and use Pythagoras.

x^2 + x^2 = 22^2
x^2 + x^2 = 484
2x^2 = 484
x^2 = 242
x = 11√2

One side of the playground is 11√2 m long.

5 0

4 years ago

I REALLY need answers, like if you see this PLEASE answer it

lana [24]

-4, -1, 1, 3, 3.9, 3.999,

3 0

3 years ago

Jeremy spends $4.00 for breakfast and then spends $4.00 for lunch

vazorg [7]

Answer:

He spends 8 dollars

Step-by-step explanation:

4 + 4 = 8

Hopefully this helps you :)

pls mark brainlest ;)

3 0

4 years ago

If you have 22 teams what's the next higher power of 2

Vesnalui [34]

I think it is 482...

6 0

3 years ago