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In a group of 5 friends, the average age is 24 years. If the age of one friend i

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Question: In a group of 5 friends, the average age is 24 years. If the age of one friend is 30 years, what is the average age of the remaining friends?

Options:

  1. 22
  2. 23
  3. 24
  4. 25

Correct Answer: 23

Solution: 

The total age of the 5 friends is 5 * 24 = 120. The total age of the remaining 4 friends is 120 - 30 = 90. The average age of the remaining friends is 90 / 4 = 22.5.

In a group of 5 friends, the average age is 24 years. If the age of one friend i

Practice Questions

Q1
In a group of 5 friends, the average age is 24 years. If the age of one friend is 30 years, what is the average age of the remaining friends?
  1. 22
  2. 23
  3. 24
  4. 25

Questions & Step-by-Step Solutions

In a group of 5 friends, the average age is 24 years. If the age of one friend is 30 years, what is the average age of the remaining friends?
Correct Answer: 22.5
  • Step 1: Calculate the total age of the 5 friends by multiplying the average age by the number of friends. Total age = 5 * 24 = 120.
  • Step 2: Subtract the age of the one friend (30 years) from the total age to find the total age of the remaining 4 friends. Remaining age = 120 - 30 = 90.
  • Step 3: Calculate the average age of the remaining 4 friends by dividing their total age by the number of remaining friends. Average age = 90 / 4 = 22.5.
  • Average Calculation – Understanding how to calculate the average age based on total age and number of individuals.
  • Total Age Calculation – Calculating the total age of a group from the average and the number of individuals.
  • Subtraction in Averages – Subtracting the age of one individual from the total to find the new average for the remaining group.
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