In a class of 39 students the ratio of boys and girls is 2 : 1. Radhika ranks 15th among all the students from top and 8th among girls from bottom. How many boys are there below Radhika ?
Explanation:
Total student= 39, boys : girls = 2:1,
hence no of boys= 2/3(39)= 26
num of girls= 1/3(39) = 13 ,
since radhika ranked 15 among 39 student from top
and ranked 8 among girls from bottom ,
this means 7 girls are below radhika,
rest 13-9= 5 girls are above her,
now from 14 toper 5 are girls hence 14-5=9 boys.
Number of boys below radhika are 26-9=17
Hence, option 2 is the correct answer.
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By: Amit Kumar