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drpharmd1769
07.07.2019 •
Mathematics
On three rolls of a single die, you will lose $19 if a 3 turns up at least once, and you will win $5 otherwise. what is the expected value of the game?
let x be the random variable for the amount won on a single play of this game.
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Ответ:
It is expected to lose 5.10 dollars
Step-by-step explanation:
The probability of getting a 3 by throwing a die once is 1/6.
By throwing it 3 times the probability of not getting a 3 is:
Then the probability of obtaining a three at least once in the 3 attempts is:
So if X is the discrete random variable that represents the amount gained in a single move of this game, the expected gain E(X) is:
Ответ:
-16 cents
Step-by-step explanation:
We are given that on three rolls of a single die, you will lose $19 if a 3 turns up at least once, and you will win $5 otherwise.
We are to find the expected value of the game.
P (at least one 5 in three rolls) = 1 - P (no. of 3 in three) =
= 0.875
P (other results) = 1 - 0.875 = 0.125
Random game value = -19, +5
Probabilities: 0.875, 0.125
Expected game value (X) = 0.875 × (-19) + 0.125 × (5) = -16 cents
Therefore, every time you play the game, you can expect to lose 16 cents
Ответ:
d. (18.7)
Step-by-step explanation:
The formula for the law of sines in order to find m^2
This equation was derived because:
m=the side you are finding
j=side that is adjacent to M, the angle with side m as its opposite
k=side that is also adjacent to M
In short,
(The opposite side of angle)^2=(Adjacent side of angle)^2 + (The other adjacent side of angle)^2 - (the adjacent side) (the other adjacent side