Question:
Average age of 10 chess players is 32 years. When the age of their coach is added, their average age becomes 34 years. The age of their coach is ____.
Average age of 10 chess players is 32 years. When the age of their coach is added, their average age becomes 34 years. The age of their coach is ____.
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In average-related questions, use the formula:
\[
\text{New average} = \frac{\text{Total sum of ages}}{\text{Number of people}}.
\]
Updated On: Apr 15, 2025
- 44 years
- 56 years
- 40 years
- 54 years
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The Correct Option is D
Solution and Explanation
The total age of the 10 players is \( 10 \times 32 = 320 \). When the coach is added, the total age of the 11 people becomes \( 11 \times 34 = 374 \). Therefore, the coach’s age is \( 374 - 320 = 54 \) years.
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