The average age of a group of 4 friends is 36 years.The youngest friend amongst them is 6 years old.What was the average age of the group at the time of the birth of the youngest friend?
Question
The average age of a group of 4 friends is 36 years.The youngest friend amongst them is 6 years old.What was the average age of the group at the time of the birth of the youngest friend?
Solution
To solve this problem, we first need to find the total age of the 4 friends. Since the average age is 36 years, the total age would be 4 friends * 36 years/friend = 144 years.
Next, we subtract the age of the youngest friend from the total age, because we want to find the total age of the group at the time of the youngest friend's birth. So, 144 years - 6 years = 138 years.
Finally, we find the average age of the group at the time of the youngest friend's birth by dividing the total age by the number of friends. So, 138 years / 4 friends = 34.5 years.
Therefore, the average age of the group at the time of the birth of the youngest friend was 34.5 years.
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