The average age of 9 students and their teacher is 16 yr. The average – McqOptions

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1.	The average age of 9 students and their teacher is 16 yr. The average age of the first four students is 19 yr and that of the last five is 10 yr. The teacher's age is ?
A.	36 yr
B.	34 yr
C.	30 yr
D.	28 yr
Answer» C. 30 yr

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