Multiple choice

The average age of 8 members of a committee is 40 years. If an old member of 55 years retires and a new member of 39 years is admitted what is the average age of the present committee?

  1. $39 years$
  2. $38 years$
  3. $36 years$
  4. $35 years$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total age of 8 members = 8×40 = 320 years. After replacing 55-year-old with 39-year-old: new total = 320 - 55 + 39 = 304 years. New average = 304/8 = 38 years.