Maths The average age of 9 students and their teacher is 16 years. The average age of the first four students is 19 years and that of the last five students is 10 years. What is the age of the teacher?
| Q.200868: The average age of 9 students and their teacher is 16 years. The average age of the first four students is 19 years and that of the last five students is 10 years. What is the age of the teacher? |
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