3 years ago

#4 ) The U.S., from 2004-2015... PLZ HELP I NEED IT TODAY

Mathematics

1 answer:

Keith_Richards [23]3 years ago

8 0

I think your answers are correct

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What is {2745 x 4799}

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Answer:

13,173,255

Step-by-step explanation:

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2 years ago

Find the reciprocal of 4/19

Sedbober [7]

19/4

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A family took a trip. They spent $90.71 for gasoline, $153.00 on meals, $197.00 on amusements, and $73.38 on miscellaneous expen

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The correct answers is 414.09

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3 years ago

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Solve the word problem and show your work.<br><br>I need help

Aleksandr [31]

Answer:

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Step-by-step explanation:

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2 years ago

Suppose a box of Cracker Jacks contains one of 5 toy prizes: a small rubber ball, a whistle, a Captain America decoder ring, a r

lakkis [162]

Answer:

11.42 boxes

Step-by-step explanation:

For the first box bought, there is a 100% chance of getting a unique toy (since you still don't have any). E₁ = 1.

After that, there is a 4 in 5 chance of getting a unique toy from the next box, the expected number of boxes required is:

$E_2 = (\frac{4}{5})^{-1} = 1.25$

For the next unique toy, there is now a 3 in 5 chance of getting it:

$E_3 = (\frac{3}{5})^{-1} = 1.67$

Following that logic, there is a 2 in 5 chance of getting the 4th unique toy:

$E_4 = (\frac{2}{5})^{-1} = 2.5$

Finally, there is a 1 in 5 chance to get the last unique toy:

$E_5 = (\frac{1}{5})^{-1} = 5$

The expected number of boxes to obtain a full set is:

$E=E_1+E_2+E_3+E_4+E_5\\E=1+1.25+1.67+2.5+5\\E=11.42\ boxes$

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2 years ago