The average age of 20 boys in a class is 12 years and that of 10 gi – McqOptions

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1.	The average age of 20 boys in a class is 12 years and that of 10 girls of the class is 15 years. What is the average age of all 30 students of the class ?
A.	12 years
B.	13 years
C.	14 years
D.	15 years
Answer» C. 14 years

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