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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 :
Answer & Solution
Correct Answer:
Option
D
The number of failure boys
= $$\frac{640 × 40}{100}$$
= 256
The number of failure girls
= $$\frac{360 × 20}{100}$$
= 72
Percentage of failure students
= $$\frac{(72 + 256)}{640 + 360}$$
= 32.8%
= $$\frac{640 × 40}{100}$$
= 256
The number of failure girls
= $$\frac{360 × 20}{100}$$
= 72
Percentage of failure students
= $$\frac{(72 + 256)}{640 + 360}$$
= 32.8%
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