A) 50 yr
B) 55 yr
C) 58 yr
D) 60 yr
Correct Answer: B
Solution :
Let the age of retired teacher = x yr and average of 10 teachers = y yr \[\therefore \,\] \[y-3=\frac{10y-x+25}{10}\] \[\Rightarrow \] \[10y-30=10y-x+25\] \[\Rightarrow \] \[x=\,\,55\]You need to login to perform this action.
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