Multiple choice

The average marks obtained by 7 students in a group are 226. If the marks obtained by six of them are 340, 180, 260, 56, 275 and 307, respectively, find the marks obtained by the seventh student.

  1. 160

  2. 162

  3. 163

  4. 164
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D Correct answer
Explanation

Total marks = 7 * 226 = 1582. Sum of 6 students = 340 + 180 + 260 + 56 + 275 + 307 = 1418. Seventh student = 1582 - 1418 = 164.

AI explanation

The total marks for all 7 students are 7 times 226, which equals 1582. The sum of the marks for the six known students is 340 plus 180 plus 260 plus 56 plus 275 plus 307, which equals 1418. The marks obtained by the seventh student are the total sum minus the sum of the six students, so 1582 minus 1418 equals 164.

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