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2 years ago

Please help me out with this math problem

Mathematics

2 answers:

mestny [16]2 years ago

8 0

Answer:

To know if the equation is true, you need to write it down on a piece of paper and see if you get the results.

Step-by-step explanation:

horrorfan [7]2 years ago

3 0

Because 1+1 = 2 and 3+5 = 8

That would be 2/8

Then you divide 2/8 in half

Half of 2 = 1

Half of 8 = 4

That’s how you get the answer, 1/4

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What is the common denominator of 3/8, 3/9, 3/10.

Eddi Din [679]

I think the common denominator is 90. 8,9,and 10 can all go into 90.

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2 years ago

What is the mean of 19 22 25 28 31

Bad White [126]

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3 years ago

What is the geometric mean of 3 and 15

Helen [10]

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4 0

3 years ago

For a dinner party, a catering company charges a set

exis [7]

Answer:

$850

Step-by-step explanation:

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6 0

2 years ago

There are 4 people at a party. Consider the random variable X=’number of people having the same birthday ’ (match only month, N=

yulyashka [42]

Answer:

S = {0,2,3,4}

P(X=0) = 0.573 , P(X=2) = 0.401 , P(x=3) = 0.025, P(X=4) = 0.001

Mean = 0.879

Standard Deviation = 1.033

Step-by-step explanation:

Let the number of people having same birth month be = x

The number of ways of distributing the birthdays of the 4 men = (12*12*12*12)

The number of ways of distributing their birthdays = 12⁴

The sample space, S = { 0,2,3,4} (since 1 person cannot share birthday with himself)

P(X = 0) = $\frac{12P4}{12^{4} }$

P(X=0) = 0.573

P(X=2) = P(2 months are common) P(1 month is common, 1 month is not common)

P(X=2) = $\frac{3C2 * 12P2}{12^{4} } + \frac{4C2 * 12P3}{12^{4} }$

P(X=2) = 0.401

P(X=3) = $\frac{4C3 * 12P2}{12^{4} }$

P(x=3) = 0.025

P(X=4) = $\frac{12}{12^{4} }$

P(X=4) = 0.001

Mean, $\mu = \sum xP(x)$

$\mu = (0*0.573) + (2*0.401) + (3*0.025) + (4*0.001)\\\mu = 0.879$

Standard deviation, $SD = \sqrt{\sum x^{2} P(x) - \mu^{2}} \\SD =\sqrt{ [ (0^{2} * 0.573) + (2^{2} * 0.401) + (3^{2} * 0.025) + (4^{2} * 0.001)] - 0.879^{2}}$

SD = 1.033

4 0

3 years ago