Multiple choice

The average age of a committee of 6 is 45 years. If a member aged 30 resigns and a man aged 60 becomes a member, then the average age of the new committee is

  1. 30 years

  2. 50 years

  3. 40 years

  4. 42 years

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sum of the ages of 6 members = 45 x 6 = 270 years Sum of the ages of the remaining 5 members = 270 – 30 = 240 years New sum of the ages of 6 members = 240 + 60 = 300 years Average age of new committee = 300/6 = 50 years

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