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aliina [53]
3 years ago
11

Can someone please help

Mathematics
1 answer:
tekilochka [14]3 years ago
3 0

Answer:

-20

Step-by-step explanation: because 4 times 3 equals 12 and if you take 4 and multiple that by -3 a positive times a negative equals a negative so then -12 +|8| equals-2 becases everything in absolute bars is positive so there fore the answer is-20

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Answer:

the expected value of this raffle if you buy 1​ ticket = -0.65

Step-by-step explanation:

Given that :

Five thousand tickets are sold at​ $1 each for a charity raffle

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$50 - $1 = $49                     5/5000

$5 - $1 = $4                      20/5000

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The expected value of the raffle if 1 ticket is being bought is  as follows:

E(x) = \sum x  * P(x)

E(x) = (499 * \dfrac{1}{5000} + 299 *\dfrac{3}{5000} + 49 *\dfrac{5}{5000} + 4 * \dfrac{20}{5000}  + (-1 * \dfrac{4971}{5000} ))

E(x) = (0.0998 + 0.1794+0.049 + 0.016  + (-0.9942 ))

E(x) = (0.3442 -0.9942 )

\mathbf{E(x) = -0.65}

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