Answer – (D)
Solution:
There are 100 female students in the class, and 20% of them are Engineering students.
Now, 20% of 100 equals (20/100)*100=20.
Hence, the number of female engineering students in the class is 20.
Now, 25% of the female engineering students passed the final exam:
25%of20=(25/100)*20=5.
Hence, the number of female engineering students who passed is 5.
There are 120 male students in the class. And 25% of them are engineering students.
Now, 25% of 120 equals(25/100)*120=(14)*120=30.
Hence, the number of male engineering students is 30.
Now, 20% of the male engineering students passed the final exam:
20%of30=(20/100)*30=6.
Hence, the number of male engineering students who passed is 6.
Hence, the total number of engineering students who passed is:
(Female Engineering students who passed) +
(Male Engineering students who passed) = 5 + 6 = 11
The total number of engineering students in the class is:
(Number of female engineering students) +
(Number of male engineering students) = 30 + 20 = 50
Hence, the percentage of engineering students who passed is
(Total number of engineering students who passedTotal number of engineering students)*100
=(11/50)*100
= 22%
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