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kiruha [24]
3 years ago
7

A jar contains three red marbles and five green marbles. A marble is drawn at random and not replaced. A second marble is then d

rawn from the jar. Find the probability that the first marble is red and the second marble is green.
Mathematics
2 answers:
scoundrel [369]3 years ago
8 0

Answer:

3/28

Step-by-step explanation:

3 red+ 5 green = 8 marbles in the jar

1st marble:

P(red) = number of red/ total = 3/8

We keep the marble

2 red+ 5 green = 7 marbles in the jar

P(green) = number of green/ total = 2/7

P (red,keep,green) = P(red)* P(green) = 3/8*2/7 = 6/56 = 3/28

zvonat [6]3 years ago
6 0

Answer:  

P(red then green) = 5/8 * 3/7 = 15/56

Step-by-step explanation: Since this is a logical "and" case, we have to multiply the separate events' probabilities...thus  P(red then green) = 5/8 * 3/7 = 15/56

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Dafna11 [192]
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3 years ago
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Since opening night, attendance at Play A has increased steadily, while attendance at Play B first rose and then fell. Equations
nexus9112 [7]

Answer: option d is correct .


Step-by-step explanation:

In order to find the same attendance  we set both equation equal

8x+191 = -x^2+26x+126

simplifying equation ,we get

x^2 -18x+65=0

(x-5) (x-13) = 0

x =5  or x =13

therefore on 5th day and 13th day  both plays attendance  is same

and it is obtained by plugging x = 5 in  and x =13 in either of the equation.

for x = 5 ,

y = 8(5) +191 = 40+191 = 231

for x = 13

y = 8(13)+191

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therefore option d is correct  





4 0
3 years ago
You deposit $2000 each year into an account earning 7% interest compounded annually. How much will you have in the account in 30
SVETLANKA909090 [29]

The amount that will be in the account after 30 years is $188,921.57.

<h3>How much would be in the account after 30 years?</h3>

When an amount is compounded annually, it means that once a year, the amount invested and the interest already accrued increases in value. Compound interest leads to a higher value of deposit when compared with simple interest, where only the amount deposited increases in value once a year.

The formula that can be used to determine the future value of the deposit in 30 years is : annuity factor x yearly deposit

Annuity factor = {[(1+r)^n] - 1} / r

Where:

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$2000 x [{(1.07^30) - 1} / 0.07] = $188,921.57

To learn more about calculating the future value of an annuity, please check: brainly.com/question/24108530

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8 0
2 years ago
A prism with a base area of 8 cm² and a height of 6 cm is dilated by a factor of 5/4 .
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By the word dilated we mean to say that the dimensions of the new prism is 5/4 times that of the original solid. If we let x be the volume of the new solid,
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The value of x from the equation above is equal to 93.75 cm³. 
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20=v−7 what does v equal?
dedylja [7]

Answer:

27

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20=v-7

v=20+7

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Hence, v equals to 27

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3 years ago
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