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Multiple Choice Questions

The number of girls in electrical department is 378 less than the number of boys in electrical Find ...........

Quantitative Aptitude (HAS) Data Table

Study the following information and answer the questions that follow:
An engineering college has five branches as shown in the table. All the students study in these five branches. The ratio of number of boys to number of girls is given in the table and the percentage of student in any branch is also given. Some fields are blank you have to find the value as per the data given in each question and then solve the question.

The number of girls in electrical department is 378 less than the number of boys in electrical. Find the ratio of number of boys in Computer Science to the number of Girls in Electronics.

5:3

2:1

15:8

7:3

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Explanation:

Boys in electrical= 3x, girls=x =>3x-x=378 => 2x= 378;
total students in electrical= 3x+x=4x => 4x= 756
this 756 is 21%
Now students in Computer science= 25%=25/21*756= 900 => boys in CS= 3/5*900= 540
Students in Electronics= 12%=12/21*756= 432 => girls = 2/3* 432= 288
Ratio= 540:288 = 15:8

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