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The age of two male students is 20 years and 24 years respectively. If elder one is replaced by a female student who is half of the age of younger one, then find the new average age.
1. 12 years
2. 16 years
3. 15 years
4. 14 years

1 Answer

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Correct Answer - Option 3 : 15 years

Given:

The age of two male students is 20 years and 24 years, respectively.

Formula Used:

Average Age = (Sum of all the ages)/(Total number of students)

Calculation:

Age of the female student = half of the younger student

⇒ Age of the newly joined female student = (1/2) × 20 = 10 years

The new total age = 10 + 20 = 30 years

∴ New average age = 30/2 = 15 years 

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