In a group of students, the number of girls is

Solution

Let the total number of boys be 400. number of girls =300 (3/4X400=300) number of girls like mango juice=2/3 x 300=200 number of boys like mango juice=1/2 x 400=200 Total number of girls and boys who like mango juice (200+200) =400 Total number of girls and boys=700 Fraction of the total number of girls and boys who like mango juice= total number of girls and boys who like mango juice/total number of boys and girls = 400/700 = 4/7.