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

A. 0

B. 45

C. 47.5

D. 50

Answer: Option A

Solution(By Examveda Team)

Mark obtained by the 11th candidate
= [(45 × 22) - (55 × 10 + 40 × 11)]
= (990 - 990)
= 0