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Vincen
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In a certain class, \(x\) students are \(10\) years old, and the remaining \(y\) students are \(11\) years old. What is the average (arithmetic mean) age of all students in the class?
A. \(\dfrac{x+y}{21}\)
B. \(\dfrac{10x+11y}{21}\)
C. \(\dfrac{110xy}{x+y}\)
D. \(\dfrac{110xy}{xy}\)
E. \(\dfrac{10x+11y}{x+y}\)
Answer: E
Source: Magoosh
A. \(\dfrac{x+y}{21}\)
B. \(\dfrac{10x+11y}{21}\)
C. \(\dfrac{110xy}{x+y}\)
D. \(\dfrac{110xy}{xy}\)
E. \(\dfrac{10x+11y}{x+y}\)
Answer: E
Source: Magoosh
