High School

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Select the correct answer.

[tex]
\[
\begin{array}{|c|c|c|c|c|}
\hline
\text{Weight/Calories per Day} & \text{1000 to 1500 cal.} & \text{1500 to 2000 cal.} & \text{2000 to 2500 cal.} & \text{Total} \\
\hline
120 \text{ lb.} & 90 & 80 & 10 & 180 \\
\hline
145 \text{ lb.} & 35 & 143 & 25 & 203 \\
\hline
165 \text{ lb.} & 15 & 27 & 75 & 117 \\
\hline
\text{Total} & 140 & 250 & 110 & 500 \\
\hline
\end{array}
\]
[/tex]

Based on the data in the two-way table, what is the probability that a person consumes 1,500 to 2,000 calories in a day?

A. 0.22
B. 0.28
C. 0.35
D. 0.50

Answer :

To find the probability that a randomly selected person consumes between 1,500 and 2,000 calories per day, we follow these steps:

1. Identify the number of people consuming 1,500 to 2,000 calories. From the table, the total for this range is
[tex]$$250.$$[/tex]

2. Identify the total number of people in the survey. The overall total given in the table is
[tex]$$500.$$[/tex]

3. Use the probability formula:
[tex]$$\text{Probability} = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}.$$[/tex]

4. Substitute the values into the formula:
[tex]$$\text{Probability} = \frac{250}{500} = 0.5.$$[/tex]

Thus, the probability that a person consumes between 1,500 and 2,000 calories in a day is [tex]$0.50$[/tex], which corresponds to answer choice D.

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