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sveta [45]
3 years ago
10

A jar has 3 red marbles and 9 blue ones. If you randomly pick a marble without replacing it and then select another, what is the

fractional probability of getting 2 blue?
Mathematics
2 answers:
Nostrana [21]3 years ago
7 0
Well if the person picked a blue marble the first time that would have been a 1/3 chance the 1 would be the blue marble and the 3 would be the red.

if they then picked another marble it would have been again 1/3 assuming that they had picked a blue marble, to begin with

i hope this makes sense to anyone really  (cuz it did in my mind)  ;)
GaryK [48]3 years ago
5 0
The probability of picking two blue would be 2/9 because you would use the 2 out of the 9
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What is the degree of the polynomial?
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Answer:

2

Step-by-step explanation:

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3 years ago
A manufacturer has been selling 1000 flat-screen TVs a week at $500 each. A market survey indicates that for A manufacturer has
luda_lava [24]

Answer:

a) Demand function: q=6000-10\cdot p

b) The rebate should be of $200, so the sale price becomes $300 per unit.

c) The rebate should be of $150, so the sale price becomes $350 per unit.

Step-by-step explanation:

a) In this case, we have a known point of the demand function (1000 units sold at $500), and the slope of a linear function (increase by 100 units fora decrease in $10).

We can express the demand function (linear) as:

q=b+m\cdot p

To calculate the slope m, we use:

m=\Delta q/\Delta p=(+100)/(-10)=-10

To calculate b, we use the known point and the calculated slope:

q=b+m\cdot p\\\\b=q-m\cdot p=1000-(-10)\cdot (500)=1000+5000=6000

Then the demand function is:

q=6000-10\cdot p

b) The revenue can be expressed as:

R=q\cdot p = (6000-10p)\cdot p=6000p-10p^2

To maximize, we can derive and equal to zero

dR/dp=6000-2*10p=0\\\\20p=6000\\\\p=300

The rebate should be of $200, so the sale price becomes $300 per unit.

c) If we take into account the cost, we have that

R=q\cdot p-C=(6000p-10p^2)-(68000+100q)\\\\R=(6000p-10p^2)-(68000+100(6000-10p))\\\\R=6000p-10p^2-(68000+600000-1000p)\\\\R=-10p^2+7000p-668000

To maximize, we can derive and equal to zero

dR/dp=-20p+7000=0\\\\p=7000/20=350

The rebate should be of $150, so the sale price becomes $350 per unit.

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3 years ago
What is the slope of the line passing through points A(−18,24) and B(16,−8)?
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M= --------- = ----------- = ------ = --------------- = ------
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3 years ago
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