If the average age of 20 students in Class-I is 10 years and average a – McqOptions

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1.	If the average age of 20 students in Class-I is 10 years and average age of 25 students in Class II is 12 years, find the average age (in years) of all students.
A.	11
B.	11.111
C.	10.5
D.	10.85
Answer» C. 10.5

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