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

In an examination there were 640 boys and 360 girls. 60% of boys and 8

1.	In an examination there were 640 boys and 360 girls. 60% of boys and 80% of girls were successful. The percentage of failure was :
A.	20%
B.	60%
C.	30.5%
D.	32.8%
Answer» E.

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

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