The average age of 5 friends is 24 years. If two new friends join the group, with one aged 25 years and another aged 30 years, what will be the new average age of the expanded group?
Show answer & explanation
Correct answer: C
Explanation
Average age of 5 friends = 24 years
Therefore, total age of 5 friends = 5 × 24 = 120 years
Total age of two new friends = 25 + 30 = 55 years
Now, total age = 120 + 55 = 175 years
Total friends = 5 + 2 = 7
New average age = 175/7 = 25 years