Multiple choice

Average marks obtained by 40 students is 56. If the average marks of 8 students who failed in the examination are 10, what are the average marks of students who passed the examination?

  1. 67.50

  2. 42.45

  3. 76.55

  4. 64.50

  5. 56.70
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A Correct answer
Explanation

Total marks = 40 * 56 = 2240. Marks of 8 failed students = 8 * 10 = 80. Marks of 32 passed students = 2240 - 80 = 2160. Average marks of passed students = 2160 / 32 = 67.5.

AI explanation

The total marks of all 40 students is 40 times 56, which equals 2240. The total marks of the 8 students who failed are 8 times 10, which equals 80. The total marks of the 32 students who passed are 2240 minus 80, which equals 2160. The average marks of the passed students is 2160 divided by 32, which equals 67.50.

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