Multiple choice

The average of 8 persons is increased by 2 years ,when one of them whose age is 24 years is replaced by a new person. The age of the new person is -

  1. 42 years

  2. 40 years

  3. 38 yeas

  4. 45 years
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When replacing a person in a group, if the average increases by 2, the new person must be 2 × 8 = 16 years older than the person they replaced. Since the replaced person was 24 years old, the new person is 24 + 16 = 40 years old. Note: option C has a typo ('yeas' instead of 'years').

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