PLZZZZ HELP!!!
1 answer:
Answer:
- Expected Value= -$7
- Bill should not play the game
Step-by-step explanation:
In the game, these are the payout:
- 30% of the time you will lose 20 dollars.
- 20% of the time you lose 40 dollars.
- 10% of the time you win 50 dollars
- 40% of the time you win 5 dollars.
To compute the expected value, take note that a loss is negative while a win is positive.
Therefore:
E(X)=(-20*0.3)+(-40*0.2)+(50*0.1)+(5*0.4)
E(X)=-7
- The expected value of the event is -$7.
- Based on the negative expectation, Bill should not play this game as he is expected to incur a loss.
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Answer:
Step-by-step explanation:
fog(x)=f(g(x))
so it comes
<u>so C is the correct answer</u>
Step-by-step explanation:
In the given problem, there are two plans that can be represented with a linear function.
<h2>Plan A: </h2>A = total monthly cost of Plan A for every <em>x </em>number of movies that Sadie watches per month
Slope: $3 = The additional cost for every x number of movies watched per month
Y-intercept: $21 = The monthly cost of Plan A
Combining these elements together, we can establish the following linear function: A(x) = 3x + 21
<h2>Plan B: </h2>B = total monthly cost of Plan B for every <em>x </em>number of movies that Sadie watches per month
Slope: $1.50 = The additional cost for every x number of movies watched per month
Y-intercept: $27 = The monthly cost of Plan B
Combining these elements together, we can establish the following linear function: B(x) = 1.5x + 27 or .
In order to graph Plan A, start with plotting the y-intercept, (0, 21). The <u>y-intercept</u> is the point on the graph where it crosses the y-axis. Then, use the slope, m = 3 (rise 3, run 1), to plot the other points on the graph.
<h3><u>Plan B:</u></h3>Similarly for Plan B, start with plotting the y-intercept, (0, 27).
Then, use the (rise 3, run 2), to plot the other points on the graph.
Attached is the graphed linear functions, A(x) and B(x). The two lines intersect at point, (4, 33), which means that the total cost of Plans A and B will be the same at $33.
<h3><u>Interval of movies watched</u>: </h3>The attached graph also shows that when 0 ≤ <em>x</em> < 4, Plan A is <em><u>cheaper</u></em> than Plan B. The interval notation is: [0, 4).
This implies that when Sadie watches 0 - 4 movies per month, she will pay lesser in Plan A than Plan B.
