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gogolik [260]
3 years ago
9

A bag contains 3 gold marbles, 6 silver marbles, and 22 black marbles. Someone offers to play this game: You randomly select one

marble from the bag. If it is gold, you win $3. If it is silver, you win $2. If it is black, you lose $1. What is your expected value if you play this game
Mathematics
1 answer:
Savatey [412]3 years ago
7 0

Answer:

$-1

Step-by-step explanation:

because you have more black marbles your chances of getting a black marble are highest

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Zaid has a peculiar pair of four-sided dice. When he rolls the dice, the probability of any particular outcome is proportional t
Elden [556K]

Answer:   a) \bold{\dfrac{3}{16}}     b) \bold{\dfrac{1}{36}}

<u>Step-by-step explanation:</u>

a) In order to get an even number, you have the 3 different scenarios:

1) Even, Even, Even, Even     \dfrac{3\times 3\times 3\times 3}{6^4} \quad = \dfrac{3^4}{6^4}\quad =\dfrac{1}{16}

2) Even, Even, Odd, Odd   \dfrac{3\times 3\times 3\times 3}{6^4} \quad = \dfrac{3^4}{6^4}\quad =\dfrac{1}{16}

3) Odd, Odd, Odd, Odd   \dfrac{3\times 3\times 3\times 3}{6^4} \quad = \dfrac{3^4}{6^4}\quad =\dfrac{1}{16}

<em>Order doesn't matter</em>

Add them up to get your answer: \dfrac{1}{16}+\dfrac{1}{16}+\dfrac{1}{16}\quad =\large\boxed{\dfrac{3}{16}}

b) If one die is a 2 and another is a 3 and the other two dice can be any number, then you have 1 possibility for a 2, 1 possibility for a 3, and 6 possibilities for each of the other two dice.

\dfrac{1\times 1\times 6\times 6}{6^4}\quad =\dfrac{1}{6^2}\quad =\large\boxed{\dfrac{1}{36}}

3 0
3 years ago
Help pretty please :]
Vaselesa [24]

Answer:

<h2>A's wrong.................(I Think)</h2>

Step-by-step explanation:

i think its D is B and D the same?

7 0
3 years ago
Read 2 more answers
NEED HELP ASAP. :)))​
maksim [4K]

The difference in mail handled between 195 and 1965 is -5.4 x 10

<h3>What is the difference in mail handled?</h3>

The data on the pieces of mail handled by the United States Postal Service is written in scientific notation. Scientific notation is used to compress larger numbers into smaller numbers.

In order to write a number in scientific notation, the number is written as a decimal number, between 1 and 10 and multiplied by a power of 10. For example, 1 x 10² is equivalent to 100

Difference in mail handled = mail handled in 1995 - mail handled in 1965

(1.8 x 10^{11}) - (7.2 x 10^{10})

(1.8 - 7.2)  x 10^{11 - 10}

-5.4 x 10

To learn more about  scientific notation, please check: brainly.com/question/25334755

#SPJ1

4 0
1 year ago
The probability of drawing a black marble from a bag is 1/2, and the probability of drawing a white marble from the same bag is
s344n2d4d5 [400]
<span>W = event where white marble is drawn 
B = event where black marble is drawn 

The two events W and B are independent. This is because the marble taken out on the first draw is put back into the bag. Since W and B are independent, we can use this rule 

P(W and B) = P(w)*P(B) 


Use the rule to get 

P(W and B) = P(W)*P(B)
P(W and B) = (1/2)*(1/4)
P(W and B) = (1*1)/(2*4)

P(W and B) = 1/8 

1/8 is equivalent to 0.125. Use long division or a calculator 

0.125 = 12.5% </span>
6 0
3 years ago
Read 2 more answers
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