Multiple choice

The questions given below contain two statements giving certain data. You have to decide whether the data given in the statements are sufficient for answering the question? Mark answer- What is the average weight of a class of 40 boys? I. The total weight of 30 boys is 1800 kgs. II. The total weight of 10 boys is 650 kgs.

  1. If statement I alone is sufficient but statement II alone is not sufficient.

  2. If statement II alone is sufficient but statement I alone is not sufficient.

  3. If each statement alone (either I or II) is sufficient.

  4. If statement I and II together are not sufficient.

  5. If both statements I and II together are sufficient, but neither statement alone is sufficient.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Statement I gives the average of 30 boys only (1800/30 = 60 kg), not all 40. Statement II gives the average of 10 different boys only (650/10 = 65 kg), but these are not necessarily the remaining 10. Even combining both statements, we don't know the total weight of all 40 boys or whether the samples overlap. Therefore, the data is insufficient.

Keep practicing — related questions