In a class of 39 students, there are twice as many girls as boys. Shalini, a girl, is 10th from the top, and there are 5 girls ahead of her. How many boys are there after her?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 9
Find the number of boys in the class, then take away the boys ranked ahead of Shalini.
Girls are twice the boys, so the class is boys + 2 × boys = 3 × boys \(=39\)
Boys \(=39\div3=13\), girls \(=2\times13=26\)
Shalini is 10th, so 9 students are ahead of her
5 of them are girls, so \(9-5=4\) are boys
Boys after her \(=13-4=9\)
