Question

The average marks scored by 22 candidates in an examination are 45. The average marks of the first ten are 55 and those of last eleven are 40. The number of marks obtained by the 11th candidate. The number of marks obtained by the 11th candidate is

• A. 0
• B. 45
• C. 50
• D. 47.5

Answer 1

Answer: (A)

0

Total marks scored by 22 candidates $=22\times 45=990$
Total marks scored by first 10 candidates $=10\times 55=550$
Total marks scored by last 11 candidates $=11\times 40=440$
$\therefore$ Marks scored by 11th candidatte $=990-(550+440)=0$