In an entrance examination at different centres, a total of 25, 30, 40, 45, 60 and 100 students appeared. The pass percentagesofthe different centres are 20%, 30%, 35%, 40%, 50% and 75%, respectively. The pass percentage of the entrance examination is: (correct to the nearest integer)

A

59%

B

43%

C

53%

D

50%