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3 years ago

Find the expected value of the winnings

Mathematics

2 answers:

Oksana_A [137]3 years ago

7 0

The correct answer is 3.1!!

Bas_tet [7]3 years ago

6 0

Answer:

2.65

Step-by-step explanation:

Multiply each payout by its probability, then add those products.

See the attached image.

The first column has the payouts. The second column has the probabilities. The third column has the results of multiplying a payout by its probability.

The sum of the entries in the third column is 2.65

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<h2>The circumference is multipled by 4.</h2>

Step-by-step explanation:

The formula of an area of a circle"

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$C=2\pi r$

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The radius has increased fourfold, therefore:

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$r=11.6\ in\\\\A=\pi(11.6)^2=132.56\pi\\\\16A=(16)(134.56\pi)=2152.96\pi\ in^2$

Calculate the radius:

$\pi r^2=2152.96\pi$ <em>divide both sides by π</em>

$r^2=2152.96\to r=\sqrt{2152.96}\\\\r=46.4\ in$

Calculate the circumference of both circles:

$r=11.6\ in\\\\C=2\pi(11.6)=23.2\pi\ in$

$r=46.4\ in\\\\C'=2\pi(46.4)=92.8\pi\ in$

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