From the above pie chart
20% of the total students are in Bcom
25% of the total students are in Bsc,Csci
Number of students in Bcom=(20% of 7000)=
(20/100) X 7000=1400
Number of girls in Bcom = 60% of the 1400 students in
Bcom:
=60 X (1400/100)=840
B.Sc.C.Sci:
Number of students in B.Sc.C.Sci=(25% of 7000)=
(25/100) X 7000=1750
Number of girls in B.Sc.C.Sci = 60% of the 1750
students in B.Sc.C.Sci:
60 X (1750/100)=1050
The total number of girls in Bcom and Bsc. C.Sci are:
840 + 1050=1890
Finally, we need to calculate what percentage the total number of girls represents of the total students in the university (7000 students).
Percentage of girls = (Total number of girls / 7000)x
100
=(1890/7000) X 100=27%
The correct answer is option (d).