High School

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The following table is a partial probability distribution for the MRA Company's projected profits (\( x \) = profit in \$1,000s) for the first year of operation (the negative value denotes a loss).

\[
\begin{array}{|c|c|}
\hline
x & f(x) \\
\hline
-100 & 0.05 \\
0 & 0.15 \\
50 & 0.20 \\
100 & 0.10 \\
150 & 0.25 \\
200 & ? \\
\hline
\end{array}
\]

(a) What is the proper value for \( f(200) \)? What is your interpretation of this value?

(b) What is the probability that MRA will be profitable?

(c) What is the probability that MRA will make at least \$100,000?

Answer :

The value of (200) f(200) is 0.25, indicating a 25% probability for a $200,000 profit. MRA has a 70% chance of being profitable and a 35% chance of making at least $100,000.

To find the missing value f(200) in the probability distribution table, we can use the fact that the sum of all probabilities in a probability distribution must equal 1. Given the provided probabilities for the profits, the sum of the known probabilities is 0.05 + 0.15 + 0.20 + 0.10 + 0.25 = 0.75. Therefore, the missing value can be found by subtracting the sum of the known probabilities from 1: 1 - 0.75 = 0.25. So, f(200) = 0.25.

The interpretation of this value is that there is a 25% probability that the MRA Company will make a profit of $200,000 in the first year of operation.

To find the probability that MRA will be profitable, we sum the probabilities for profits greater than zero: 0.15 + 0.20 + 0.10 + 0.25 = 0.70, meaning there is a 70% chance of profitability.

The probability that MRA will make at least $100,000 is the sum of probabilities for profits greater than or equal to $100,000: 0.10 + 0.25 = 0.35, indicating a 35% chance of achieving this profit level.

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Complete Question:

The following table is a partial probability distribution for the MRA Company's projected profits (x = profit in $1,000s) for the first year of operation (the negative value denotes a loss).

x f(x)

-100 0.05

0 0.15

50 0.20

100 0.10

150 0.25

200 ?

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