boys = 900girls = 1100Passed = 32% of 900 + 38% of 1100 = 288 + 418 = 706Failed = 2000 - 706 = 1294Total % of failed candidates = \(\frac{(2000 - 706) }{ 2000} \)\(= \frac{1294}{2000} \)
\(= 64.7%\)
Therefore, the correct option is (B): 64.7%