In a group of 4 friends, the average age is 25 years. If one friend leaves and t

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Question: In a group of 4 friends, the average age is 25 years. If one friend leaves and the average age becomes 26 years, what is the age of the friend who left?

Options:

Correct Answer: 27

Solution:

Total age of 4 friends = 4 * 25 = 100 years. New total age for 3 friends = 3 * 26 = 78 years. Age of friend who left = 100 - 78 = 22 years.

In a group of 4 friends, the average age is 25 years. If one friend leaves and t

Practice Questions

In a group of 4 friends, the average age is 25 years. If one friend leaves and the average age becomes 26 years, what is the age of the friend who left?

Questions & Step-by-Step Solutions

In a group of 4 friends, the average age is 25 years. If one friend leaves and the average age becomes 26 years, what is the age of the friend who left?

Step 1: Calculate the total age of the 4 friends. Since the average age is 25 years, multiply 25 by 4 (the number of friends). Total age = 25 * 4 = 100 years.
Step 2: Calculate the new total age of the remaining 3 friends after one friend leaves. The new average age is 26 years, so multiply 26 by 3 (the number of remaining friends). New total age = 26 * 3 = 78 years.
Step 3: Find the age of the friend who left by subtracting the new total age of the 3 friends from the original total age of the 4 friends. Age of friend who left = 100 - 78 = 22 years.

Average Calculation – Understanding how to calculate the average age and how it changes when a member leaves the group.
Total Age Calculation – Calculating the total age of a group based on the average and the number of members.
Subtraction for Individual Age – Using subtraction to find the age of the individual who left based on the total ages before and after.

In a group of 4 friends, the average age is 25 years. If one friend leaves and t

What’s inside this PDF?

In a group of 4 friends, the average age is 25 years. If one friend leaves and t

Practice Questions

Questions & Step-by-Step Solutions

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