Question

15 years ago, the average age of all the 40 teachers of

Q: Answer-15 years ago, the average age of all the 40 teachers of the college was 50 years. 8 years ago, the p...

15 years ago, Average age of 40 teachers 50 years 8 years ago just before retirement of Principal, Average age of 40 teachers 50 7 57 years And the same time total age of 40 teachers 40 times 57 2280 years And the total age of remaining 39 teachers when just the principal has retired 2280 ndash 60 2220 years 1 year later i.e, 7 years ago from present Total age of 39 teachers just before the recruitment of new Principal 2220 1 times 39 2259 years And the total age of 40 teachers including new principal just after the recruitment 2259 56 2315 years Thus, the present age of all 40 Teachers 2315 7 times 40 2595 years there4 Present average age of all the 40 Teachers 259540 5198 years.

the college was 50 years. 8 years ago, the principal has retired from her post at the age of 60 years. So after one year a new principal whose age was 56 years recruited from outside. Find the present average age of all the teachers is, if principal is also considered as a teacher?

A 547/8 years

B 563/5 years

C 519/8 years

D 682/3 years

E None of these

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