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?
Practice Questions
1 question
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?
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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.
Questions & Step-by-step Solutions
1 item
Q
Q: 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?
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.
Steps: 3
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.
