The average age of 45 students in a class in 13 yr, 15 new students with an average age of 18 yr join the class. What is the average age of all the students in the class?

The average age of 45 students in a class in 13 yr, 15 new students wi

1.	The average age of 45 students in a class in 13 yr, 15 new students with an average age of 18 yr join the class. What is the average age of all the students in the class?
A.	13.15 yr
B.	14.25 yr
C.	12.28 yr
D.	16.42 yr
Answer» C. 12.28 yr

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The average age of 45 students in a class in 13 yr, 15 new students with an average age of 18 yr join the class. What is the average age of all the students in the class?

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