1.

1). 83 years2). 65 years3). 85 years4). 80 years

Answer»

Let the INITIAL average be ‘y’

∴ The initial sum of the AGES of the 20 employees was 20Y

Let ‘x’ be the age of the person who retired

∴ After the person RETIRES, the sum will be 20y – x + 23

We know that, Sum/(Number of values) = Average

According to the given condition,

⇒ (20y – x + 23)/20 = y – 3

∴ 20y – x + 23 = 20y – 60

∴ x = 83

∴ The age of the person who retired was 83



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