Multiple choice

The average age of 8 members of a group is 36 years. The age of the eldest member is 32 years. If we exclude that eldest member from the group, then what will be the average age (in years) of the remaining members?

  1. 38.5 years

  2. 42.67 years

  3. 48.5 years

  4. 36.57 years
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The total age is 8 × 36 = 288 years. Removing the stated 32-year-old member leaves 256 years among 7 members, so the average is 256/7 = 36.57 years approximately. The wording is inconsistent because a 32-year-old cannot be the eldest when the group average is 36 years.

AI explanation

The total age of the 8 members initially is 8 times 36, which equals 288 years. Excluding the 32-year-old eldest member leaves 7 members with a combined age of 288 minus 32, equaling 256 years. Dividing this remaining total by 7 gives 36.57 years as the new average.

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