In an examination, there are 800 boys and 600 girls. 40% boys and 60% girls passed the examination. The percentage (correct to two decimal places) of failed students from the total students is:
given there are 800 boys
40%of boys passed examination
i.e; $$800\times\frac{40}{100}$$ =320 boys passed exam
Given that there are 600 girls and 60% of girls passed exam
i.e; $$600\times\frac{60}{100}$$=360 girls
total number of passed students = 360+320=680
so no of failed students= 800+600-680
=720
so percentage of failed students = $$\frac{720\ \times\ 100}{1400}$$
51.42%
hence answer is option C
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