A) 20%
B) 60%
C) 30.5%
D) 32.8%
Correct Answer: D
Solution :
Number of failure boys\[=40%\text{ of}\,\,640\] \[=\frac{40\times 640}{100}=256\] and number of failure girls \[=20%\text{ of}\,\,360\] \[=\frac{20\times 360}{100}=72\] Total number of failure students \[=256+72\] \[=328\] and total number of students \[=640+360\] \[=1000\] \[\therefore \] Percentage of failures \[=\frac{328}{1000}\times 100%\] \[=32.8%\]You need to login to perform this action.
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