Question
point(
) possible
For a game of chance using a spinner, the probability of the event of winning when you pick a particular number is
.
Suppose you bet
to play the game, and if your number is picked, you get back
plus the
that you bet.
a. Is this a fair game?
b. What would happen if you played this game a large number of times?
a. Since the net winnings are
b. You would expect to
For a game of chance using a spinner, the probability of the event of winning when you pick a particular number is
Suppose you bet
a. Is this a fair game?
b. What would happen if you played this game a large number of times?
a. Since the net winnings are
b. You would expect to
Ask by Marsh Cox. in the United States
Mar 22,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
(a) This game is not fair because the expected value is negative.
(b) Over many plays, you would expect to lose approximately $0.04255 per game on average.
Solution
Step 1. Define the outcomes and their probabilities
- If you win, you receive
additionally, but you also recover your original wager. The net gain is therefore (since you get in total but wager to play). - If you lose, you lose your
wager, so the net gain is .
The probability of winning is
and the probability of losing is
Step 2. Calculate the expected value (net winnings) per game
The expected value
is computed as
Simplify the expression:
This is approximately:
Step 3. Answer each part
(a) Is this a fair game?
A game is fair if the expected value is
. Here, since
the game has a negative expected value for the player. Therefore, this is not a fair game.
(b) What would happen if you played this game a large number of times?
If you played the game many times, by the Law of Large Numbers, your average winnings per game would approach the expected value. This means you would expect to lose about
per game on average. Although the loss per game is small, over a large number of plays, these losses accumulate.
Answered by UpStudy AI and reviewed by a Professional Tutor
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Extra Insights
a. To determine if this is a fair game, consider the expected value of your bet. With a probability of winning
, your expected win is
, while your expected loss (losing the $1 you bet 46 times) would be
. Thus, the expected value is
, indicating that you are expected to lose money over time, making it not a fair game.
b. If you played this game a large number of times, you would expect to incur more losses than wins. Because of the game’s design, over numerous plays, the outcomes will configure to reflect the negative expected value. While you may win occasionally, the overall trend will likely leave you at a financial deficit, reinforcing the idea that this is not a game designed for profit.