Question

The mean age of 15 students in a class is 6 years. If the age of
their teacher is included, mean becomes 9 years. Which is the age of
the teacher?

Answer 1

Answer:

might be wrong but 54

Step-by-step explanation:

15 × 6 = 90

90 + 54 = 144

144 ÷ 16 = 9

hope this helps