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3 years ago

I GIVE BRAINLILSETTTTTTTTTTTTTTTT

Mathematics

2 answers:

Natasha2012 [34]3 years ago

6 0

Answer:

96.

Step-by-step explanation:

3.20/8 =0.4

38.4/.4=96

fredd [130]3 years ago

3 0

Answer:

The answer is b

pls brainleist

Step-by-step explanation:

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Sara needs 48 apples. There are 10 apples in each box. How many boxes should Sara buy?

olasank [31]

She should buy 5 boxes because if she bought 4 then she would have 8 without a box

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4 years ago

You’ve bought a half-dozen (six) eggs from the store but you forgot to check them first! The probability that no eggs are broken

GREYUIT [131]

Answer:

$P(X = 0) = C_{6,0}.(0.1416)^{0}.(0.8584)^{6} = 0.4$

$P(X = 1) = C_{6,1}.(0.1416)^{1}.(8584)^{5} = 0.3960$

$P(X = 2) = C_{6,2}.(0.1416)^{2}.(8584)^{4} = 0.1633$

$P(X = 3) = C_{6,3}.(0.1416)^{3}.(8584)^{3} = 0.0359$

$P(X = 4) = C_{6,4}.(0.1416)^{4}.(8584)^{2} = 0.0044$

$P(X = 5) = C_{6,5}.(0.1416)^{5}.(8584)^{1} = 0.0003$

$P(X = 6) = C_{6,6}.(0.1416)^{6}.(8584)^{0} = 0.00001$

b) 56.77% probability that an even number of eggs is broken.

Expectation: 0.8496

Variance: 0.7293

Step-by-step explanation:

For each egg, there are only two possible outcomes. Either it is broken, or it is not. The probability of an egg being broken is independent from other eggs. So we use the binomial probability distribution to solve this question.

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.

The expected value of the binomial distribution is:

$E(X) = np$

The variance of the binomial distribution is:

$V(X) = np(1-p)$

There are 6 eggs

So $n = 6$

The probability that no eggs are broken is 0.4.

This means that $P(X = 0) = 0.4$ . So

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

$P(X = 0) = C_{6,0}.p^{0}.(1-p)^{6}$

$(1 - p)^{6} = 0.4$

Taking the sixth root from both sides of the equality

$(1 - p) = 0.8584$

p = 0.1416

Each egg has a 0.1416 probability of being broken

(a) Write out the pmf of X.

Probability of each value, from 0 to 6

$P(X = 0) = C_{6,0}.(0.1416)^{0}.(0.8584)^{6} = 0.4$

$P(X = 1) = C_{6,1}.(0.1416)^{1}.(8584)^{5} = 0.3960$

$P(X = 2) = C_{6,2}.(0.1416)^{2}.(8584)^{4} = 0.1633$

$P(X = 3) = C_{6,3}.(0.1416)^{3}.(8584)^{3} = 0.0359$

$P(X = 4) = C_{6,4}.(0.1416)^{4}.(8584)^{2} = 0.0044$

$P(X = 5) = C_{6,5}.(0.1416)^{5}.(8584)^{1} = 0.0003$

$P(X = 6) = C_{6,6}.(0.1416)^{6}.(8584)^{0} = 0.00001$

(b) Compute the probability that an even number of eggs is broken.

0, 2, 4 or 6

$P = P(X = 0) + P(X = 2) + P(X = 4) + P(X = 6) = 0.4 + 0.1633 + 0.0044 + 0.00001 = 0.5677$

56.77% probability that an even number of eggs is broken.

(c) Compute the expectation and variance of X.

Expectation:

$E(X) = np = 6*0.1416 = 0.8496$

Variance:

$V(X) = np(1-p) = 6*0.1416*0.8584 = 0.7293$

7 0

4 years ago

What is the value of y, type only a numeric answer.

Art [367]

Answer:

Y=150

Step-by-step explanation:

4 0

4 years ago

A train travels 40 miles and 65 minutes to the nearest tenth of a mile how far does the train travel per minute

erik [133]

Answer:1.625

Step-by-step explanation:you just divide 65 and 40

8 0

3 years ago

Find the other endpoint of the line segment with the given endpoint and midpoint. Endpoint 1: (-10,6) midpoint: (7,-6)

blsea [12.9K]

The other end point is (24, -18)

Solution:

Given that,

Endpoint 1 is (-10, 6)

Midpoint is: (7, -6)

We have to find the other endpoint

The midpoint is given by formula:

$M(x, y) = (\frac{x_1+x_2}{2} , \frac{y_1 + y_2}{2})$

From given,

$M(x, y) = (7, -6)\\\\(x_1, y_1) = (-10, 6)\\\\(x_2, y_2) = ?$

Substituting the values we get,

$(7, -6) = (\frac{-10+x_2}{2} , \frac{6+y_2}{2})$

On comparing both sides we get,

$7 = \frac{-10+x_2}{2} \text{ and } -6 = \frac{6+y_2}{2}\\\\14 = -10 + x_2 \text{ and } -12 = 6 + y_2\\\\x_2 = 24 \text{ and } y_2 = -18$

Thus the other end point is (24, -18)

3 0

4 years ago