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Example 18 : 10 years ago the average age of all the 25 teachers of the girls college was 45 years. 4 years ago the principal has retired from her post at the a
Example 18 : 10 years ago the average age of all the 25 teachers of the Girls college was 45 years. 4 years ago the principal has retired from her post at the age of 60 year. So after one year a new principal whose age was 54 years recruited from outside. The present average age of all the teachers is, if principal is also considered as a teacher 18 (A) 5425 years (B) 5525 years (C) 49 years (D) None of these
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Avijeet banerjee![best-answer]()
option (A) is correct. explanation is given in the attachment.
how the ages of principals 66 and 59
present age of old principal is 66 since 6 years ago he retired from his job at the age of 60 .and new principal joined 5 years ago at the age of 54.
After the retirement of old principal 1 year later new principal joined at the age of 54.
ok