In a class of 39 where girls are twice to that of boys. Shalini, a girl 10th from the top. If there are 5 girls ahead of her then, how many boys are after her?
Answer & explanation
Correct answer: option 1
Number of girls are twice to that of boys.
i.e. G = 2B
Total number of students = 39
G + B = 39
2B + B = 39
3B = 39
B= 13 ( number of boys)
G= 26 ( number of girls )
Now,
Shalini is 10th from top and 5 girls are ahead of her . That means there are are 4 boys ahead of her .
So, number of boys after shalini = total number of boys - number of boys ahead of her
= 13 - 4 = 9