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3 years ago

Mathematics help please!!

Mathematics

1 answer:

Elodia [21]3 years ago

3 0

D no solution at least there shouldnt be because when 5 is square rooted times itself it would equal 5 and then adding a variable would make it higher, so d no solution

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x P(x) 0 0.25 1 0.3 2 0.1 3 0.35 Find the standard deviation of this probability distribution. Give your answer to at least 2 de

barxatty [35]

Answer:

The standard deviation of this probability distribution is 1.2.

Step-by-step explanation:

We have that:

P(X = 0) = 0.25

P(X = 1) = 0.3

P(X = 2) = 0.1

P(X = 3) = 0.35

Mean:

Each value multiplied by its probability. So

$M = 0*0.25 + 1*0.3 + 2*0.1 + 3*0.35 = 1.55$

Variance:

Sum of the squares of the values subtracted from the mean, and multiplied by its probability.

$V = 0.25*(0-1.55)^2 + 0.3*(1-1.55)^2 + 0.1*(2-1.55)^2 + 0.35*(3-1.55)^2 = 1.4475$

Standard deviation:

Square root of the variance. So

$S = \sqrt{V} = \sqrt{1.4475} = 1.2$

The standard deviation of this probability distribution is 1.2.

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3 years ago

6,12,11,8,4,1,11,4 median

WARRIOR [948]

Answer:

Step-by-step explanation:

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3 years ago

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Stefanie spends entire allowance one month she spends 1/2 of a on new clothes 1/4 on food 1/6 on movies and 1/12 on Music how mu

Komok [63]

Answer:

Option D: 1/3

Step-by-step explanation:

Let

x ------> the entire Stefanie's allowance

we know that

She spends on clothes (1/2)x

She spends on movies (1/6)x

To find out how much more does she spend on clothes that he does on movies, subtract the amount she spends on movies from the amount she spend on clothes

$\frac{1}{2}x-\frac{1}{6}x=\frac{2}{6}x$

Simplify

$\frac{1}{3}x$

therefore

She spends 1/3 more on clothes that he does on movies

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2 years ago

The identity (x2 + y2) = (x2 - y2) + (2xy)? can be used to generate Pythagorean triples. What

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Answer: 5329, 3025, 2304

Step-by-step explanation:

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Parker is designing a new board game, and is trying to figure out all the possible outcomes. How many different possible outcome

lutik1710 [3]

Answer:60

Step-by-step explanation:

4*3*5

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2 years ago