The average age of a group of 8 persons is 40 years. A person aged 60 years leaves the group and another person aged 44 years joins the group. The new average age of the group is
options:
1.44 years
2.38 years
3.45 years
4.40 years
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The correct option is 2) 38 years.
The new average age of the group is 38 years.
The average age is of 8 persons = 40 years.
Sum of the ages = 40× 8 = 320
Total sum of 7 persons age = 320 - 60 = 260
As one new person is added in the group,
Hence, the total sum of ages = 260+44 = 304
New average = 304/4 = 38.
The new average age of the group is 38 years.
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