In an examination there were 640 boys and 360 girls, 60% of boys and 80% of were

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In an examination there were 640 boys and 360 girls, 60% of boys and 80% of were successful. The percentage of failure was :

Options:

A . 20%

B . 60%

C . 30.5%

D . 32.8%

Answer: Option D

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