The average age of a group of 28 persons is 24 years. If a new person is included then the average age rises by 1 year, then the present age of the new person will be which of the following?

25
27
32
30
53

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 5 : 53

Given:

Average age of 28 persons = 24 years

When a new person is included average age rises by 1 year

Concept:

Here the concept is, Total age of the group = Number of persons in the group × Average age of the group

Explanation:

Total age of the group = 28 × 24 = 672

When a new person is included the average age rises to 25

⇒ Now, after the inclusion of a new person the total age = 29 × 25 = 725

The difference between total ages before and after the inclusion of the new person is his age

⇒ Present age of the person included = 725 – 672 = 53

4 views Answered 2022-09-04 04:29

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