The average mark obtained by 22 candidates in an examination is 45. The…
2024
The average mark obtained by 22 candidates in an examination is 45. The average of the first ten is 55 while the last eleven is 40 .The marks obtained by the 11th candidate is ?
- A.
3
- B.
2
- C.
1
- D.
0
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Correct answer: D
Total marks: 22 × 45 = 990
Sum of the first ten candidates: 10 × 55 = 550
Sum of the last eleven candidates: 11 × 40 = 440
Let x be the marks of the 11th candidate. Then 550 + x + 440 = 990, so x = 990 − (550 + 440) = 0.
Therefore the marks obtained by the 11th candidate is 0.