Multiple choice

The average weight of six students is 55 kg. If two students with equal weight leave the group, the average becomes 50. Find the weight of each student.

  1. 60 kg

  2. 65 kg

  3. 68 kg

  4. 72 kg
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total weight of 6 students = 6 * 55 = 330. After 2 students leave, 4 students remain with average 50, so total weight = 4 * 50 = 200. Weight of 2 students = 330 - 200 = 130. Weight per student = 130 / 2 = 65.

AI explanation

The total weight of all six students initially is 6 multiplied by 55, giving 330 kg. When two students leave, the total weight of the remaining four students is 4 multiplied by 50, which equals 200 kg. The combined weight of the two students who left is the difference between the totals, giving 130 kg. Dividing this combined weight by 2 gives an individual weight of 65 kg for each of those students.

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