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3 years ago

How many committes of 3 people can be formed from 7 people order does not matter?

Mathematics

1 answer:

Phoenix [80]3 years ago

5 0

You can form 2 and then you have the odd one out.

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PLEASE HELP ASAP I WILL MARK BRAINLIEST!!

Mariulka [41]

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4 0

3 years ago

Read 2 more answers

A statistician uses Chebyshev's Theorem to estimate that at least 15 % of a population lies between the values 9 and 20. Use thi

rjkz [21]

Answer:

\mu = 14.5\\

\sigma = 5.071\\

k = 1.084

Step-by-step explanation:

given that a statistician uses Chebyshev's Theorem to estimate that at least 15 % of a population lies between the values 9 and 20.

i.e. his findings with respect to probability are

$P(9$

Recall Chebyshev's inequality that

$P(|X-\mu |\geq k\sigma )\leq {\frac {1}{k^{2}}}\\P(|X-\mu |\leq k\sigma )\geq 1-{\frac {1}{k^{2}}}\\$

Comparing with the Ii equation which is appropriate here we find that

$\mu =14.5$

Next what we find is

$k\sigma = 5.5\\1-\frac{1}{k^2} =0.15\\\frac{1}{k^2}=0.85\\k=1.084\\1.084 (\sigma) = 5.5\\\sigma = 5.071$

Thus from the given information we find that

$\mu = 14.5\\\sigma = 5.071\\k = 1.084$

5 0

3 years ago

Find the equation of the line that passes through the point (-2,7) and is perpendicular to the line y= 2/5x-1/5

-BARSIC- [3]

Step-by-step explanation:

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3 0

3 years ago

Find the soluations to (x+3)^2=49

Jobisdone [24]

Answer:

x = 4 , − 10

Step-by-step explanation:

3 0

3 years ago

-(x+3) = 2x-6 what is x

Makovka662 [10]

Answer:

x=1

Step-by-step explanation:

So, first you make sure to multiply the parenthesis by the negative so then it would be,

-x-3=2x-6

Then you add the -3 from the right to the other side

so, -x=2x-3

Then you want all the X variables to one side so you subtract the 2x to both sides.

so, -3x=-3

divide both by -3

x=1

7 0

3 years ago