A) 20
B) 25
C) 30
D) Data inadequate
Correct Answer: C
Solution :
Let the number of boys and girls participating in sports be 3x and 2x respectively. Then, \[3x=15\] or \[x=5.\] So, number of girls participating in sports \[=2x~=10.\] Number of students not participating in sports \[=60-15(15+10)=35.\] Let number of boys not participating in sports be y. Then, number of girls not participating in sports \[=(35-y).\] \[\therefore \] \[(35-y)=y+5\] \[\Leftrightarrow \] \[2y=30\] \[\Leftrightarrow \] y = 15. So, number of girls nor participating in sports \[=(35-15)=20.\] Hence, total number of-girls in the class = (10 + 20) = 30.You need to login to perform this action.
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