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APPLICATION The star hitter on the baseball team at City Community College had a batting average of 375 before the start of a three-game series. (Note: Batting average is calculated by dividing hits by times at bat; sacrifice bunts and walks do not count as times at bat.) During the three games, he came to the plate to bat eleven times. In these eleven plate appearances, he walked twice and had one sacrifice bunt. He either got a hit or struck out in his other plate appearances. If his batting average was the same at the end of the three-game series as at the beginning how many hits did he get?

Short Answer

Expert verified
The player got 3 hits during the series.

Step by step solution

01

Understand the Current Situation

The batter has a batting average of 0.375. This implies that before the series, if he had \(x\) times at bat, he had \(0.375x\) hits.
02

Determine Times at Bat and Hits During Series

During the three-game series, he came to bat 11 times in total. However, two walks and one sacrifice bunt should be excluded from his times at bat. Therefore, he batted legitimately for \(11 - 2 - 1 = 8\) times.
03

Define Equation for Batting Average

Let \(H\) be the number of hits he had before the series, and \(A\) the number of at-bats before the series. Before the series, his batting average was \(\frac{H}{A} = 0.375\). Over 8 at-bats, his average remained at 0.375.
04

Calculate Hits Needed to Maintain Average

We want his average after the series to remain the same. Thus, we calculate:\[\frac{H + \, \text{hits in series}}{A + 8} = 0.375\]Solving for the total hits at the end, we rearrange:\[H + \, \text{hits in series} = 0.375(A + 8)\]This should equal the initial total hits \(0.375A + \, \text{hits in series} = 0.375A + 3\). Consequently, to keep the average 0.375 overall, he needed 3 hits during the series.
05

Verify Solution

To ensure the batter's average remained 0.375:- His new hit total would be: original hits + 3 hits in the series.- New total at-bat appearances: \(A + 8\).- Check that \(\frac{0.375A + 3}{A + 8} = 0.375\), ensuring calculation correctness.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Batting Average
Batting average is a key statistic in baseball, measuring a player's hitting performance. It is calculated by dividing the number of hits by the number of legitimate at-bats. For example, if a player has 10 hits in 40 at-bats, the batting average is calculated as follows: - Total Hits: 10 - Total At-Bats: 40 - Batting Average: \( \frac{10}{40} = 0.25 \)Important factors that do not count as at-bats include:- Walks- Sacrifice buntsThese components ensure that batting averages accurately reflect a player's hitting ability by focusing strictly on hit attempts. In our exercise, the player had an average of 0.375, indicating he successfully hit the ball 37.5% of the time he was at bat, excluding walks and sacrifice bunts.
Equation Solving
Equation solving is an essential skill in mathematics, especially when dealing with formulas and averages. In the provided exercise, we used an equation to find out the number of hits the player made during the series.The basic idea is to create an equation with known values and variables representing unknown quantities. Here's a simplified breakdown:- The player's average is set by the ratio \( \frac{H}{A} = 0.375 \)- We need to find how many hits occurred in 8 legitimate at-bats during the series- We set up the equation \( \frac{0.375A + \text{hits in series}}{A + 8} = 0.375 \)By solving this equation, we determine the hits needed to maintain the batting average. It involves substituting known values and manipulating the equation to isolate the variable of interest. In essence, equation solving allows us to use arithmetic and algebra to find solutions efficiently.
Mathematical Reasoning
Mathematical reasoning involves logical thinking to solve problems and make connections between mathematical concepts. In the context of our exercise, reasoning guides us to understand how each element affects the final calculation. Here’s how mathematical reasoning was applied: - **Identifying Variables:** We recognize which elements are fixed (such as initial average) and which are variables (at-bats and hits). - **Structuring Relationships:** Recognizing the relationship between hits and at-bats and how they directly influence the batting average. - **Maintaining Consistency:** Ensuring the batting average remains constant despite changes in total at-bats, using reasoning to adjust calculations. This systematic approach allows us to make sense of the numbers and symbols and solve for the unknown. By applying logical thought processes, mathematical reasoning helps us derive conclusions, gaining insights into complex problems and simplifying them into manageable steps.

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