Multiple choice

The average age of A, B, C and D is 44 years. D leaves the group. If D is 48 years old, then find the new average of the group.

  1. 42 years

  2. 42.67 years

  3. 45.33 years

  4. 42.88 years

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

Total age of 4 people = 44 * 4 = 176. After D leaves, total age = 176 - 48 = 128. New average = 128 / 3 = 42.666... which rounds to 42.67.

AI explanation

The total age of A, B, C and D is 4 multiplied by 44, which equals 176 years. When D leaves, the sum of the ages of the remaining 3 people is 176 minus 48, giving 128 years. The new average is 128 divided by 3, which equals 42.66 years, or approximately 42.67 years.

Keep practicing — related questions