Multiple choice

A school has 20 teachers one of them retires at the age of 60 years and a new teacher replaces him this change reduces the average age of the staff by 2 years the age of new teacher is

  1. $28\ years$
  2. $25\ years$
  3. $20\ years$
  4. $18\ years$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total age reduction = 20 * 2 = 40 years. The new teacher is 40 years younger than the retiring teacher. Age = 60 - 40 = 20 years.

AI explanation

The reduction in the average age by 2 years means the total age of the staff decreases by 20 multiplied by 2, which is 40 years. If the retiring teacher is 60 years old, the new teacher must be 40 years younger to account for this total decrease. Therefore, the age of the new teacher is 60 - 40, which equals 20 years. The age of the new teacher is 20 years.

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